Apr 302010

In the last blog, I started out with a simple label printing application using the DLS SDK. If you are planning on using the SDK, you’ll need to become familiar with two objects that will do the bulk of label printing work in your application. The first one the DymoAddin object, the other is the DymoLabels object. We will examine on the DymoAddin object in this post.


The DymoAddin object got its name from the time when DYMO needed to create addins for 3rd party applications. Instead of re-writing all the label printing code in a separate library, then using the library to implement the 3rd party addins (like the DLS MS Office Addins, DLS ACT! Addin, DLS QuickBooks Addin), we simply added a COM interface to the DLS application so we can leverage the label printing functionality from the DLS application. The first interface exposed was called the IDymoAddin interface, and the object that implemented the interface was called the DymoAddin object.

There are many methods exposed in the IDymoAddin interface, however, only a part of it is really intended for the SDK. The methods that don’t fall in this group are there because we (i.e. DYMO) needed it to implement some functionality for the addins we write for other applications. Call it lack of planning or oversight, these methods and properties that are really meant for internal DYMO use are lumped together in the same IDymoAddin interface that is used for SDK applications. For the most part, you should avoid using these methods and properties in your application. But as you sit down to understand the DLS SDK and design your own application, you’ll likely find that these methods and properties are too specialized and are not needed for your SDK application.

But what are these functions and methods that you shouldn’t use? Instead of listing them here, I will instead focus on the methods that are meant to be used by SDK applications.

Main Functionality

In the last blog, I outlined the three main concepts used in the DLS SDK. The first is the concept of a label file. The main functionality of the DymoAddin object is to implement the IDymoAddin interface, which provides operations you can perform on a label file, including opening, saving, and printing a label file. Because printing is part of the functionality, the IDymoAddin interface also provides methods to list and select DYMO printers for use in your SDK application. I will explore these methods and their usage (in C#) below.

File Operations

The Open(), Save(), and SaveAs() methods combined to give you the ability to open and save labels on your computer’s local file system. The same operations can be used on network storage if the storage location is addressable using UNC (i.e. Universal Naming Convention).

The following example shows how to open a label file and then save it with a different file name:

 1 private void FileOperatoinsExample()
 2 {
 3     DymoAddInClass _dymoAddin = new DymoAddInClass();
 5     // open a label file using absolute path, relative path
 6     // or UNC (for network accessible locations)
 7     if (_dymoAddin.Open(@"..LabelsSample.label"))
 8     {
 9         _dymoAddin.SaveAs(@"..LabelsSampleCopy.label");
10     }
12     if (_dymoAddin.Open(@"C:UsersckhsuLabelsSample.label"))
13     {
14         _dymoAddin.SaveAs(@"C:UsersckhsulabelsSampleCopy.label");
15     }
17     if (_dymoAddin.Open(@"\File ServerSharedLabelsSample.label"))
18     {
19         _dymoAddin.SaveAs(@"\File ServerSharedLabelsSampleCopy.label");
20     }
21 }

Web Applications

Sometimes the label file you need is located in the cloud and you need to access it using an URL. The OpenURL() method is created for this purpose.

Proxy Server and Proxy Bypass

The OpenURL() method is implemented using WinInet. This means that the user’s proxy settings in IE is used when calling the OpenURL(). But depending on your application, this might not be desirable. You can use the following methods and properties to control proxy settings used for the OpenURL() method. These settings are good for the lifetime of the DymoAddinObject, but are not persistent beyond that. So if you free and create another instance of the DymoAddinObject, you will need to setup the custom proxy settings again for the next OpenURL call.

  • ProxyBypass property – set to True to bypass all proxy servers. When this property is set to True, it overrides all other proxy settings.
  • SetupProxySettings() method – setup custom proxy settings.
  • ClearProxySettings() method – clear all proxy settings and revert back to using IE’s proxy settings.

The following example shows how to open a label file using an URL.

 1 private void URLFileOperatoinsExample()
 2 {
 3     DymoAddInClass _dymoAddin = new DymoAddInClass();
 5     // use custom proxy setup.
 6     // by default, the OpenURL() method uses the same proxy
 7     // settings as IE
 8     _dymoAddin.proxyBypass = false;
 9     _dymoAddin.SetupProxySettings("http", "dymo_proxy_server", 80, "*.internal.dymo.*", "", "");
11     // open a label file using URL
12     if (_dymoAddin.OpenURL("http://www.mylabelprinter.com/labels/shipping.lwl"))
13     {
14         _dymoAddin.SaveAs(@"LabelsSampleCopy.label");
15     }
16 }

Database Operations

If your application uses a database to store label files, you can use the OpenStream() and SaveStream() methods to open and save label files using memory buffers.

The following example shows how to open and save label files into memory buffers:

 1 private void OpenAndSaveStreamExample()
 2 {
 3     DymoAddInClass _dymoAddin = new DymoAddInClass();
 5     // this is the buffer that will hold an array of bytes
 6     object buf = null;
 8     if (_dymoAddin.Open(System.IO.Path.Combine(
 9                             System.IO.Directory.GetCurrentDirectory(),
10                             @"DatabaseLabel.label")))
11     {
12         // get an array of bytes from Save Stream
13         buf = _dymoAddin.SaveStream();
15         // at this point, you can store buf as a blob
16         // in your database
17         byte[] blob = (byte[])buf;
18     }
20     // to open a label file from a blob in your database
21     // first, read the blob into into an array of bytes
22     // then pass the array of bytes to OpenStream
23     System.IO.MemoryStream ms = new System.IO.MemoryStream();
25     // the following line is psuedo code aimed to illustrate how one
26     // might read a blob into an array of bytes
27     !!!Database.Table("Labels Table").Field("Shipping Label").SaveToStream(ms);
29     // at this point, you can read the bytes
30     _dymoAddin.OpenStream(ms.GetBuffer());
31 }

Printer Related Operations

The DLS SDK (and therefore your SDK applications) can only be used with LabelWriter printers. Because of this, we added printer listing and selection methods to filter out printers that are not compatible with the DLS SDK so your application will not need extra code to deal with printer compatibility and selection issues.

The following example shows how to get a list of LabelWriter printers installed on the computer, and selects a printer named “My LabelWriter” to print a label file:

 1 private void SelectPrinterAndPrintLabelExample()
 2 {
 3     DymoAddInClass _dymoAddin = new DymoAddInClass();
 5     string[] printers = _dymoAddin.GetDymoPrinters().Split(new char[] { '|' });
 6     foreach (var printer in printers)
 7     {
 8         // find the printer we want to print to
 9         if (printer == "My LabelWriter")
10         {
11             // select it first
12             _dymoAddin.SelectPrinter(printer);
14             // then print the currently open label
15             if (_dymoAddin.IsTwinTurboPrinter(printer))
16             {
17                 // print one copy of label to the left tray
18                 _dymoAddin.Print2(1, false, 0);
19             }
20             else
21             {
22                 // print one copy of label to the only tray
23                 _dymoAddin.Print(1, false);
24             }
25             break;
26         }
27     }
28 }

A new method worth mentioning is the IsPrinterOnline() method, which return the online/offline status of a printer.


Although the DymoAddin object’s name may not invoke any ideas of the functionality it provides, it is an important part of the because of the rich features it provides. I hope this blogs gives you a good idea of the DymoAddin object’s capabilities and how to best use the capabilities for your specific application.

  75 Responses to “The DymoAddin Object”

  1. I am trying to invoke the SaveStream method to get the bytes of a label. I get this exception:

    Memory is locked. (Exception from HRESULT: 0x8002000D (DISP_E_ARRAYISLOCKED))

    Any ideas?

    This is running in an ASP .NET C# app using .NET 3.5. I am using the 8.2 SDK. I have tried several different versions but my code is this:

    DymoAddInClass addIn = new DymoAddInClass();

    if (addIn.Open(“HomeVisit.label”))

    DymoLabelsClass labels = new DymoLabelsClass();

    labels.SetField(“BARCODE”, “123456”);
    labels.SetField(“TEXT”, “123456”);
    labels.SetField(“TEXT_1”, “My Visit”);
    labels.SetField(“TEXT_2”, “My Item”);

    object theObject = addIn.SaveStream();

    • Hi,
      Thank you for the question, it led me to find and fix a bug in the SDK. Anyway, here is the solution:

      1. download the zip file containing the fix here.
      2. extract the dll from the zip file into the Program FilesDYMODYMO Label Software folder (you will be prompted to replace the existing file, click Yes).
      3. rerun your application, the problem will be fixed.

      Because DLS 8.2.2.x is just released, the fix will not be there. However, we are making a DLS 8.2.3 release shortly to support x64 SDK applications. The fix will be in that release. For now, you can use the zip file as a workaround. I apologize for the troubles.



  2. Hi,

    I try a following cod snippet but I get 2 error in a code.
    I marked both error on code (Here1, and Here2)

    Imports System.ComponentModel
    Imports System.Text
    Imports Dymo

    Public Class InsertNewParts

    Private Sub Print_Label(ByVal sender As Object, ByVal e As EventArgs)

    Dim _dymoAddin As New DymoAddInClass()
    Dim _dymoLabel As New DymoLabelsClass()
    ‘Dim peldany As Int32 = Val(Me.TextBox1.Text)

    ‘ open the to-do-list label we created earlier
    If _dymoAddin.Open(“C:UserDataDymodbarcode.label”) Then
    ‘ this call returns a list of objects on the label
    Dim objNames() As String = _dymoLabel.GetObjectNames(False).Split(New Char() {“|”c})

    ‘ verify that our text object is on the label
    If objNames.Contains(“code1”) Then <<<< Here1. 'Contains' is not a member of 'system.Array'
    ' take the to-do's list entered by the user
    ' and put in on the label
    If _dymoLabel.SetField("todos", NewIdTbx.Text) Then
    ' let's print to the first LabelWriter available
    ' on the pc, if the printer is a TwiTurbo, print
    ' to the left tray
    Dim printers() As String = _dymoAddin.GetDymoPrinters().Split(New Char() {"|"c})
    For Each printer In printers <<< Here 2. Name 'printer' is not declared….
    If printer Is "SpareP_LabelWriter" Then
    ' select it first

    ' then print the currently open label
    If _dymoAddin.IsTwinTurboPrinter(printer) Then
    ' print one copy of label to the left tray
    _dymoAddin.Print2(1, False, 0)
    ' print one copy of label to the only tray
    _dymoAddin.Print(1, False)
    End If
    End If
    End If
    End If
    End If

    End Sub

    End Class

    Visual Studio 2005
    Net-framework 2.0

    I wait for your answer.
    Thanks and Regards

    • for #1 – System.Array class does not have Contains method. Try Exists() or Find() instead.
      for #2 – you did not declare Printer variable

      • Hi Vladimir,

        I try a following version (modification):

        In the version not visible error, but after call the sub I get error messages….

        This is a Sub:

        Private Sub Print_Label()

        Dim _dymoAddin As New DymoAddInClass()
        Dim _dymoLabel As New DymoLabelsClass()
        Dim printer As Object

        ‘ open the to-do-list label we created earlier
        If _dymoAddin.Open(“C:UserDataDymodbarcode.lwl”) Then
        ‘ this call returns a list of objects on the label
        Dim objNames() As String = _dymoLabel.GetObjectNames(False).Split(New Char() {“|”c})

        ‘ verify that our text object is on the label

        If objNames.Equals(“WLOK_BARCODE”) Then
        ‘ take the to-do’s list entered by the user
        ‘ and put in on the label
        If _dymoLabel.SetField(“WLOK_BARCODE”, NewIdTbx.Text) Then
        ‘ let’s print to the first LabelWriter available
        ‘ on the pc, if the printer is a TwiTurbo, print
        ‘ to the left tray
        Dim printers() As String = _dymoAddin.GetDymoPrinters().Split(New Char() {“|”c})
        For Each printer In printers
        If printer Is “DYMO LabelWriter 400″ Then
        ‘ select it first

        ‘ then print the currently open label
        If _dymoAddin.IsTwinTurboPrinter(printer) Then
        ‘ print one copy of label to the left tray
        _dymoAddin.Print2(1, False, 0)
        ‘ print one copy of label to the only tray
        _dymoAddin.Print(1, False)
        End If
        End If
        End If
        End If
        End If

        End Sub

        This is the error:

        System.Runtime.InteropServices.COMException was unhandled
        Message=”Creating an instance of the COM component with CLSID {09DAFAE2-8EB0-11D2-8E5D-00A02415E90F} from the IClassFactory failed due to the following error: 80040154.”
        at SPAREPART_INVENTORY_SYSTEM.NewParts.Print_Label() in C:UserDatamilusVisualStudio_ProjectsSPAREPART INVENTORY SYSTEMSPAREPART INVENTORY SYSTEMNewParts.vb:line 107
        at SPAREPART_INVENTORY_SYSTEM.NewParts.Button1_Click(Object sender, EventArgs e) in C:UserDatamilusVisualStudio_ProjectsSPAREPART INVENTORY SYSTEMSPAREPART INVENTORY SYSTEMNewParts.vb:line 62
        at System.Windows.Forms.Control.OnClick(EventArgs e)
        at System.Windows.Forms.Button.OnClick(EventArgs e)
        at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)
        at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
        at System.Windows.Forms.Control.WndProc(Message& m)
        at System.Windows.Forms.ButtonBase.WndProc(Message& m)
        at System.Windows.Forms.Button.WndProc(Message& m)
        at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
        at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
        at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
        at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
        at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(Int32 dwComponentID, Int32 reason, Int32 pvLoopData)
        at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
        at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
        at System.Windows.Forms.Application.Run(ApplicationContext context)
        at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.OnRun()
        at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.DoApplicationModel()
        at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.Run(String[] commandLine)
        at SPAREPART_INVENTORY_SYSTEM.My.MyApplication.Main(String[] Args) in 17d14f5c-a337-4978-8281-53493378c1071.vb:line 81
        at System.AppDomain.nExecuteAssembly(Assembly assembly, String[] args)
        at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
        at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
        at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
        at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
        at System.Threading.ThreadHelper.ThreadStart()

      • Hallo Vladimir,

        I hope you are fine.

        My program running under 32 BIT, and WinXp
        I installed latest program for printer (
        I created label file etc. everything is fine.

        But I when “click”
        on Print button then nothing.. nothing happens, and the printer does not react, and then I do not receive an error messages

        I attached ftp link with my test program src:

        I would like to ask for you if you have little free time then you would be able to test the program possibly what may be the trouble how?

        Thanks and Regards

        • you have to debug your application a little bit.

          you cannot call objNames.Equals(“todos”) because objNames is Array and “todos” is a String. Use Find or Exists instead.

          check the printer name you are using, currently it is “DYMO LabelWriter 400″ Then” that is wrong.

  3. I can’t get the OpenURL() method to work. It always returns false. I’m doing this in Javascript in the browser. I have tried using a URL on the same domain as well as on another domain (should that make any difference?) It works neither in Firefox or IE. I’m not using any special Internet settings, and therefore haven’t configured any custom proxy. In Firefox the DLS SDK is installed. It all works fine with a local file using Open(), but not using a URL with OpenURL(). I have version of the software installed. How can I debug this? Possible to get specific error messages?

    BTW, is there a complete language reference with all the methods and properties? The SDK 8.0 only contains the PDF “DLS 7 Compatibility Library Manual.pdf” which basically only describes certain enhancements to the original objects…

    • What does happen when you open the URL passed to OpenURL() directly in the browser? does the browser open it? I mean, verify that the URL is accessible.

      As for documentation, “DLS 7 Compatibility Library Manual.pdf” contains a full list of supported methods, not the changed ones only. Please, read carefully.

  4. sir,

    i developed windows application with DYMO label writer400… , when published into server. when print page renders it is giving “retrieving the COM class factory for component with CLSID {09dafae2-8eb0-11d2-8e5d-11d2-8e5d-00a024-15e90f} fialed due to the following Error.”

    please can you help how to render this page.

    Thnaks Regards

  5. Hi,

    I’m writing a little application for Excel 2003 using VBA.

    So far i got something working but i would like to READ also the label Height, Width Left, … properties, but can’t figure out how to do.
    Can someone help me?
    Any help apreciated.

    Sub PrintLabel()
    ‘deze routine werkt 100% !

    ‘voor ontwikkel info zie : http://developers.dymo.com/

    Dim myDymo As DYMO_DLS_SDK.DymoHighLevelSDK
    Dim DymoAddIns As DYMO_DLS_SDK.ISDKDymoAddin
    Dim DymoLabels As DYMO_DLS_SDK.ISDKDymoLabels
    Dim Q
    Dim Cntr As Integer

    ‘preset values & objects
    PrintString = frmDymo.tbBarcode.Value
    ‘skip if nothing to print
    If PrintString “” Then
    Set myDymo = New DYMO_DLS_SDK.DymoHighLevelSDK
    Set DymoAddIns = myDymo.DymoAddIn
    Set DymoLabels = myDymo.DymoLabels

    PrintLabelCopies = frmDymo.tbPrintLabelCopies.Value
    ‘get printer
    DymoAddIns.SelectPrinter DymoAddIns.GetDymoPrinters
    ‘get label
    DymoAddIns.Open (ThisWorkbook.Path & “Labels” & DymoLabelName) ‘

    Dim objNames(20) As String
    myObjectnames = DymoLabels.GetObjectNames(False) ‘<< returns ONLY the "MyBarcode" name.
    'be sure to set the barcodeprint mode
    DymoAddIns.SetGraphicsAndBarcodePrintMode (True)
    DymoLabels.SetField "MyBarcode", PrintString
    For Cntr = 1 To PrintLabelCopies
    If DymoAddIns.IsTwinTurboPrinter(DymoPrintername) = True Then 'print one copy of label to the left tray
    Q = DymoAddIns.Print2(PrintLabelCopies, False, 0)
    Q = DymoAddIns.Print(1, False) 'print one copy of label to the only tray
    End If
    PrintLabelCopies = PrintLabelCopies – 1
    'release objects
    Set DymoLabels = Nothing
    Set DymoAddIns = Nothing
    Set myDymo = Nothing
    End If
    End Sub


    • to do that you will need to use so called “low level” API. There is no sample in VBA, but the steps are: create LabelEngine object; access LblInfo by using LabelEngine.PrintObjects property; then you can get label properties like LabelWidth, LabelHeight, etc. See documentation for the detail, or C++ sample in the “SamplesLow Level COM” folder.

      BTW, out of curiosity, what is your use case? why do you need to access those properties? Thanks.

      • Hi Vladimir,

        Thanks for the fast feedback.

        The main purpose of the little utility is as follow.
        Using a hand scanner, we copy a barcode (Code 128) and printout a (few) copie(s) of it, without the need of clicking on a ‘Print’ button. So when ever the barcode is scanned, it will be automaticly printed in x copies. I dont think the the Excel add-in is able to do so, because i’m asked for this ‘enhancement’, thats why i’m writing this little application’.
        I’m also no software engineer at all, i do it just because i like it to write some utilities for the group i’m working for. Pure interest.

        Reading the label info ( + text position on the label) is informative info on the userform.
        Could be of little interest if we want to print a too long text on a certain label.
        I noticed that you get the text “Barcode doesn’t fit” on the label if the text is to long (or the size is too large to fit).

        What i find as a shortcomming is the absence of little examples on how to use the components and there properties in the DLS 7 Compatibility Library Manual.pdf, like you find back in the Help (F1) in the VBA editor. Thats realy handy.


        • Thought it is possible to get barcode object position and size on the label, it will not help in determine is the actual barcode fit or not. Barcode object size is fixed, while the actual size of “bars/spaces” depends on the entered/scanned data. Depending on the barcode type you are using you might determine the maximum number of character a current barcode object can hold on a particular label and warn user if the number of entered/scanned character is greater. What barcode type are you using (Code39, Code128, etc)? Usually the barcode size depends on overall number of characters, not the characters themselves, thought sometimes it is important to know the exact string to encode…

  6. Hi again,

    We use ‘normally’ Code128 and label 99017.
    The scanned barcode to copy on the new labels is only build up with numbers 0 to 9.
    The string lenght is 10 characters long ex: 1890221234

    I noticed alreddy while experimenting that the barcode doesn’t fit always. I changed the barcode size from “Medium” to “Small” using the DYMO Label V8 application, and now it fit. For the moment i didn’t check how many characters there fit on the specified label.
    Once i know that, i can write it also into the registry settings using something similar as following VBA code:
    SaveSetting appname:=ThisWorkbook.Name, section:=”Startup”, key:=”LabelName”, setting:=DymoLabelName

    So, knowing witch human readable character uses the most space in “Barcode bars / spaces” can help me determine the maximum number of allowed characters to scan.
    According to what i found on Wikipedia is this the letter “X”, right?

    Thanks again for the quick responce.

  7. Hi there,
    I have, on my Dev PC a LabelWriter 400 installed and my code for quick print on a single label works fine
    When installed at the customer site, where they have a Dymo 460 printer I am getting the following error:

    Unable to cast COM object of type ‘Dymo.DymoAddInClass’ to interface type ‘Dymo.IDymoAddIn5’. This operation failed because the QueryInterface call on the COM component for the interface with IID ‘{A1CD66DC-6A1F-4FD6-A7EF-57D00E28E00A}’ failed due to the following error: No such interface supported (Exception from HRESULT: 0x80004002 (E_NOINTERFACE)).

    I tried installing the customers drivers on my machine but it gives the same error here then
    Dymo.DymoAddInClass dymo = new Dymo.DymoAddInClass();
    dymo.SmartPasteFromString(sAddress); //errors on this line

    I tried dymo.StartPrintJob() instead and declaring labels etc but ti then errored there instead.

    What have i done wrong?? – any help much appreciated

    Cheers James

    • DYMO Label software should be installed on the customer machine.

      • Hi Vladimir,
        I’m afraid you might have misunderstood me – I meant when the Application that I have written, that allows the users to print labels is installed on their site.

        cheers james

        • Your application uses DYMO DLS SDK. So, DYMO DLS SDK libraries should be installed on the machine your application is running on. So, DYMO Label software should be installed on that machine, because DYMO Label software installer installs all needed libraries for an SDK application.

  8. Hi Vladimir,
    thanks for that – I will try installing the same version of the SDK on the customers machine – I didn’t think installing the SDK would be necessary so I only installed the drivers when installing the printer as I thought that my applications msi installer would include and install all of the files necessary for it to connect.

    cheers and thanks for your replies


  9. Hi,
    We have web page with javascript which is generating and printing label. It works fine with Internet Explorer in version 6. But now some users upgraded IE to version 8. With IE script fails with error “Automation server can’t create object” when DymoAddIn object is being created in the javascript code:

    var DymoAddIn = new ActiveXObject(“Dymo.DymoAddIn”);

    Can you advise how to deal with this issue?

  10. Hi!

    I need to print tape labels via the lower print head of the LabelWriter Duo.

    I am using VBA (or VB6, if you prefer) with Access 2010. The ‘old’ DLS calls no longer work with the new Ver. 8 DLS! What happened to ‘DymoTapeAddIn’?

    Please, where is the documentation for the new VBA ver. 8 framework & examples?? I have donwloaded two versions of your SDK and neither one contains the info required to deal with VBA.
    Where did the declarations such as ‘DYMO_DLS_SDK.DymoHighLevelSDK’ shown in post #5 come from? I haven’t seen this in any docs from Dymo.

    I really need this info soon.

    Thanks in advance!

    • IDymoTapeAddIn is not supported in DLS8. To print on a tape printer you have to use DYMO Label Framework API. Unfortunately there is almost zero documentation and samples for the COM part of the API. You could kind of deduct it the usage from the TLB file and .NET documentation available in BETA SDK in [My Documents]DYMO LabelSDKDYMO Label FrameworkdocDYMOLabelFramework.chm. I know, it is very limited, and I apologize for inconvenience. As for VBA sample, you can find a Access 2010 sample database here.

  11. I cannot get the DymoAddIn.open() working it just return false. any advice ( i am using VC sharp).

  12. I have a Delphi application using the Dymo COM objects.

    Some of our users are starting to install Dymo LabelWriter 450 Twin Turbo machines with Dymo v 8 software. Labels saved using this are in the .label format.

    The SDK library procedures for GetObjectNames that worked in the previous versions of the Dymo labels do not work with the .label formats.

    I loaded down the SDK for version 8 but that has no Delphi support options like the previous versions did. The code also needs to be able to work with all versions of Dymo software and printers.

    Are there any options for me to get around this?

    • There are two ways to fix this. Ether install an update to DLS7 that adds LW450 support, http://www.dymo.com/media/Software/DLS_7_Update.zip; or make sure the customers install the latest version of DLS8, as of 2011-09020 it is 8.3.1, http://download.dymo.com/download/Win/DLS8Setup. The latter way is more preferred in a long run.

      • Thanks for the response Vladimir.

        However, this does not get around my issue that I want to have access to SDK functionality within my Delphi software to support the v8 Dymo software (I can sort out having separate functionality to cope with different sites running different versions of the Dymo labels), but the SDK for v8 does not include any Delphi COM objects that allow me to communicate with labels created in v8 with the .label extensions.

        • The SDK API in DLS8 is backward compatible, really it provides EXACTLY the same COM interfaces. You can just install DLS 8.3.1 and use your application without recompilation.

          • Thats fantastic that it is backwards compatible which should mean I don’t have to change my code for the different versions of Dymo printers and label templates.

            However, this still leaves me with the fact that there is nothing in the v8 SDK for Delphi. What I was expecting was to have a Delphi directory under High Level Com that contained the Dymo_TBL.pas file that contained the procedures to interface with the printers as there was in the previous versions of the SDK. With the SDK for version 7, the GetObjectNames procedure does not return the objects in a v8 .label template presumably because it doesn’t know that the template file is now an XML document. Therefore I cannot assign contents to the fields on the label so when it then goes to print the label it just produces a blank label.

          • Make sure you have DLS 8.3.1 installed

          • I have Dymo Label and the DYMO Label v.8 SDK (not sure if there is any version number assigned to that) which has a DLS 7 Compatibility Library directory that has a Samples directory which contains a High Level COM directory – under this there are directories for dotNet, Firefox, etc but not one for Delphi as there was in the DLS_SDK for version 7.

          • Yes, Delphi samples were excluded from DLS8 SDK installer. Please, notice, that the SDK installer contains documentation and samples only, not libraries. Libraries are included with DLS installer itself. And the SDK API is fully binary compatible, although the implementation is different. You can install DLS7 SDK to view old Delphi samples, it is available on http://sites.dymo.com/DeveloperProgram/Pages/LW_SDK_Windows.aspx, http://download.dymo.com/Download%20Drivers/Software%20for%20DYMO%20LabelWriter/Downloads/13/WIN_DLS_SDK_0508.EXE.

            If you want to recreate Dymo_TLB.pas (though it is not necessary), use “Project/Import Type Library” menu item in Delphi7, select “DLS SDK COM Type Library”, and press “Create Unit” button.

            Now, if you still have a problem (after installing DLS 8.3.1) with GetObjectNames method, please send the label file and the code fragment shows how you call the SDK. Thanks you.

  13. I have version

    I note that in the Dymo_TBL, there are separate IDymoAddins up to IDymoAddin5. Numbers 4 and 5 have procedures for IsTwinTurboPrinter. However, if I try to create an IDymoAddin4 object, I get a Class not registered error message and can’t create the ActiveX object with code below

    //Dymo Library classes names:
    IDymoAddInName = ‘Dymo.DymoAddIn4’;
    IDymoLabelsName = ‘Dymo.DymoLabels’;

    { TDymoLabel }

    constructor TDymoLabel.create(aOwner: TComponent);
    inherited create(aOwner);
    //Create Dymo Label ActiveX objects.
    DL := CreateOleObject(IDymoAddInName) as IDymoAddIn4;
    LB := CreateOleObject(IDymoLabelsName) as IDymoLabels;
    MsgWarning(‘Unable to create Dymo Label ActiveX objects.’);

    Does this suggest that the Dymo 8 software has not installed all the classes required and that maybe that is why I cannot get the fields in the label file for the .label files. I was just using the base IDymoAddin object and using the code below which was passed a stringlist of field names and data and the label file to print to get the fields from the label file and print the label. The LB.GetObjectNames(True), didn’t return anything. Also included below is the contents on the .label file.

    procedure TDymoLabel.InstantPrintLabel(FieldValues: TStringlist; LabeFile: string;
    aCopies: byte = 1; PrintIt: boolean = True);
    ObjectList: String;
    FieldList: tstringlist;
    i: integer;
    //Create Dymo Label ActiveX objects.
    if fileexists(LabeFile) then begin
    FieldList := TStringlist.create;
    ObjectList := LB.GetObjectNames(false);
    For i := 0 to FieldList.Count – 1 do
    LB.SetField (FieldList[i], StrToDef(RepStr(FieldValues.values[FieldList[i]],’/n’,#13#10),’ ‘));
    if PrintIt then
    DL.Print(aCopies, false);
    LogAppError(‘File not found ‘ + LabeFile,1,”);

    30323 Shipping



    Client short name



    Client short name


    • First, COM-class ProgID and the interface name(s) the class support are different things. So, in your code you have to create the object by providing its ProgID, that is ‘‘Dymo.DymoAddIn’, not ‘Dymo.DymoAddIn4′. You still can cast/QueryInterfrace the object to IDymoAddIn4 if you need to access the new methods defined by this interface. Second, it is hard to say why you don’t get object names without debugging. Here are some tips:
      – make sure DL.Open(LabeFile) completed succe3ssully. The call returns True on success, False otherwise. If it returns False, make sure the label file does exists, and it is a valid label file. To check it is a valid label file, try to open it using DYMO Label software v8.
      – call LB.GetObjectNames(True) and check the result. It should be non-empty string, assuming your label file loaded correctly and the label file contains some label objects.
      – install DebugView, run it, run your application, look for any error messages in DebugView

      • Hi Vladimir,

        Setting the class correctly and using the DymoAddin4 appears to have solved the problems. I am now getting the fields in the .label labels as well as being able to process labels created with earlier versions of the Dymo software.

        Many thanks for your help with this.

  14. Hi,

    I have a working Excel VBA application on XP & Excel2003 with a older version of the DLS8 SETUP.
    Because of rumors that the company will switch to Win7 / Office2010 i’m trying to get it working on my PC at home
    (VISTA / Exel2007), and hope it will work then also on Win7 & Excel2010.
    I don’t have a 450Turbo printer at home too.

    I installed the DLS8Setup. on the Vista (without a 450 Turbo printer connected at the end of the installation) and checked the checbox ‘DYMO Label software V.8 SDK’ in the VBE references listbox.

    I use the same XLA utility as on the XP / Excel2003 machine, but it won’t work at all.
    I can’t create the ‘Dymo.DymoAddin’ object.

    Here below a snipset of the VBA code.
    Anyone any clue why it can’t create the Dymo.DymoAddin object, but does on the XP/ Excel2003 machine?
    I need to get it working before the switch to Win7 / Office2010.

    Could it be that its because i haven’t connected a DYMO printer at the end of the installation?

    Sub TestIfOnline()
    If CreateDymoPrinterObjects Then
    Application.Cursor = xlWait
    With g_oDymoPrinter
    g_sDymoPrintername = .GetCurrentPrinterName
    g_bOnLine = .IsPrinterOnline(g_sDymoPrintername)
    End With ‘//g_oDymoPrinter
    If Not g_bOnLine Then
    g_iMyErrorNumber = 1
    End If
    Application.Cursor = xlDefault
    End If
    End Sub
    Function CreateDymoPrinterObjects() As Boolean
    ‘This fuction creates IDYMOAddIn object
    On Error Resume Next
    If (g_oDymoPrinter Is Nothing) Then
    Set g_oDymoPrinter = CreateObject(“Dymo.DymoAddin”) ‘
    End If
    CreateDymoPrinterObjects = (Err = 0)
    If Not CreateDymoPrinterObjects Then
    MsgBox “Unable to create OLE objects: Dymo.DymoAddin”
    End If
    End Function

    Any help welcome.

  15. Hello,
    I have a VB.Net 2003 application that use to be installed on windows XP machine, Now my clients uses windows 7/8 but when my application try to call the dymo labelprinter 400 Turbo I got error saying “COM object with CLSID {09DAFAE2-8EB0-11D2-8E5D-00A02415E90F} is either not valid or not registered.” can you please guide me on how to make this work again with windows 7 or windows 8 Please?

    Thanks A lot!!

  16. Hello,

    in delphi I try to make an easy program to print a label.

    Everything seems to go fine untill the moment of printing.

    then I get: “floating point invalid operation at …”

    The coding I use looks like:

    unit DymoApp;


    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Dymo_TLB, ComObj;


    TForm2 = class(TForm)
    Button1: TButton;
    Label1: TLabel;
    procedure Button1Click(Sender: TObject);
    { Private declarations }
    { Public declarations }

    Form2: TForm2;
    DL : IDymoAddin;
    LB : IDymoLabels;


    {$R *.dfm}

    procedure TForm2.Button1Click(Sender: TObject);

    DL := CreateOleObject(‘Dymo.DymoAddIn’) as IDymoAddin ;
    LB := CreateOleObject(‘Dymo.DymoLabels’) as IDymoLabels;

    Label1.Caption := DL.GetDymoPrinters ;

    if DL.Open(‘J:\ABPf-Software\EtiketLabel.label’)
    LB.SetField(‘NAAM’,’EUKANUBA hond 10kg’);



    What do I miss?

    • I’ll start by asking if you have the latest DLS (8.5.1) installed and can you print successfully from the DLS application? DLS is a required install for any SDK application to work.
      I’m not very familiar with Delphi but can you narrow down what line is throwing the error? I noticed that you are not checking the return for DL or LB to see if it returned a valid structure. I would start there. Maybe another reader that is familiar with Delphi could help out.

  17. Hi
    I am having trouble with some code written in Visual Studio 2010 Visual Basic. I took this code from something I had written earlier for Excel VBA and it worked fine. I had to tweak the code a little for VS 2010 but everything works except one thing. The “myLabel.SetText(“TEXT”, texttoprint) will not send text to the field on the label and actually gives an error saying “Missing Member Exception was unhandled”…”Public member ‘Settext’ on type ‘Boolean’ not found.” I have listed the code below. I feel I am doing something wrong in the creation of the label object. Can you please help?

    Thanks, Kevin

    Private Sub printlabel(labeltoprint As String, texttoprint As String)

    ‘print module
    Dim myDymo As New Object
    Dim myLabel As New Object
    Dim sPrinters As String
    Dim arrPrinters() As String

    ‘On Error Resume Next
    myDymo = CreateObject(“Dymo.DymoAddIn”)
    myLabel = CreateObject(“Dymo.DymoLabels”)

    If (myDymo Is Nothing) Or (myLabel Is Nothing) Then
    MsgBox(“Unable to create OLE objects.” & Chr(10) & “Please Install Dymo Printing Software” & Chr(10) & “and make sure that a Dymo printer is available.”)
    Exit Sub
    End If

    ‘Check forDymo printer(s)
    ‘If there is one proceed and store the printernames in a variable, else quit
    sPrinters = myDymo.GetDymoPrinters()
    If sPrinters = “” Then
    MsgBox(“No Dymo Printers Found”)
    Exit Sub
    End If

    myDymo.SelectPrinter(sPrinters(0)) ‘0 is first Dymo printer, you could use the printername instead: SelectPrinter “YourPrintername”

    ‘Open the label template
    myLabel = myDymo.Open(serverlocation & labeltoprint)
    myLabel.Settext(“TEXT”, texttoprint)

    ‘Print the label
    myDymo.Print(1, False) ‘ Print 1 copy

    ‘Clean up
    myLabel = Nothing
    myDymo = Nothing

    ‘reset label checkboxes
    CheckBox2.Checked = False
    CheckBox3.Checked = False
    CheckBox4.Checked = False
    CheckBox5.Checked = False
    CheckBox6.Checked = False
    CheckBox7.Checked = False
    ComboBox1.SelectedIndex = -1

    End Sub

    • Please make sure that the latest DLS v8.5.1 is installed.

      If DLS is already installed, are you able to print from DLS? If yes, are you able to print from the following sample app?

      • Yes, I have DLS v8.5.1 installed. I can print fine from DLS and the sample you gave me printed slowly but worked and printed 2 labels. Does that help narrow down the problem? Thanks for your help!

      • Also, just so you know. The code I have will print the correct label I choose with the correct background image, it just will not put the text in the “TEXT” box object.
        Thanks, Kevin

        • Please make sure that opening the label template was successful. Are you loading the label template from a network path? If yes, try loading the label template locally?

          • The label template is on a server, but even opening it locally, it still gives and error on the “myLabel.Settext” command saying it is not a command in the label object. If I leave in the “On Error Resume Next”, it will print the correct label but there is not text in the text box of the label. Do I need to be creating the label object using “Framework”? If so, how do I do that. Do you have any samples in VB for Visual Studio 2010 or VB.Net (if that is what Visual Studio 2010 uses. The sample you referred to in the link earlier is also in VBA)?
            The “myLabel = CreateObject(“Dymo.DymoLabels”)” worked in VBA for Excel on the same label templates (on the server) but will not work with VB in VS 2010. I see examples on the internet where people use a “Framework” in creating the Dymo and Label objects, or they use IDymo and ILabel. I just want to make sure I am creating the Label Object correctly.
            Thanks. Kevin

          • Actually, I don’t think it is opening the label template correctly. If I debug along the program, it creates the “myLabel” as an object (System._ComObject). But then after it runs the “myLabel = myDymo.Open(serverlocation & labeltoprint)” command, it shows myLabel as being “False{Boolean}”. Is there a different command I should use to open the label file?

          • Correct, the sample I have referred above is in VBA. DYMO doesn’t have any other VB/VBA sample. The sample is using the “DYMO.Label.Framework” and OpenLabelXml() to load the label template.

            Are you using an old label template (lwt or lwl file extension)? Please make sure you are using the new label template (label file exension). Use DLS 8.5.1 to design your label and save it as a label template.

          • I am using the “.Label” file extension. Can you tell me if I need to “Import” anything at the top of my code to have the “Framework” incorporated into the programming? Also, do I need to use the Framework for creating the “myDymo” dymo object as well or just for the “myLabel” label object?
            So if I change code to the following, would I need to make other changes?

            Dim myDymo As New Object
            Dim myLabel As New Object
            myDymo = CreateObject(“Dymo.DymoAddIn”)
            myLabel = CreateObject(“Dymo.Label.Framework”)
            myLabel = myDymo.OpenLabelXml(serverlocation & labeltoprint)
            myLabel.Settext(“TEXT”, texttoprint)

            would that seem to be correct?

            Thanks and sorry for so many questions,

          • Here comes the embedded code of the DymoLabelFramework.accdb:

            Option Compare Database
            Option Explicit

            Private Sub Form_Load()


            End Sub

            ‘loads available printers into PrinteRList listbox
            Private Sub LoadPrinterList()

            Dim Framework As IFramework

            Dim PrinterCount, i As Integer
            Dim Printer As IPrinter

            Set Framework = CreateObject(“DYMO.Label.Framework”)

            PrinterCount = Framework.Printers.Count

            For i = 0 To PrinterCount – 1
            ‘PrinterList.AddItem Framework.Printers.Item(i).Name
            If i > 0 Then
            PrinterList.RowSource = PrinterList.RowSource & “;”
            End If
            PrinterList.RowSource = PrinterList.RowSource & Framework.Printers.Item(i).Name
            Next i

            ‘ select first printer if any
            If PrinterList.ListCount > 0 Then
            PrinterList.Selected(0) = True
            End If

            End Sub

            Private Sub PrintButton_Click()

            Dim Framework As IFramework
            Dim PrinterCount, i As Integer
            Dim Printer As IPrinter

            Set Framework = CreateObject(“DYMO.Label.Framework”)

            Set Printer = Framework.GetPrinterByName(PrinterList.Value)

            If Printer.PrinterType = “LabelWriter” Then
            Call PrintLabelWriterLabel(Framework, Printer)
            Call PrintTapeLabel(Framework, Printer)
            End If

            End Sub

            Private Sub PrintLabelWriterLabel(Framework As IFramework, Printer As IPrinter)

            Dim LabelXml As String
            Dim LabelSet As ILabelSetBuilder
            Dim LabelRecord As ILabelRecordBuilder
            Dim PrintParams As ILabelWriterPrintParams
            Dim Label As ILabel

            ‘load label xml
            LabelXml = DFirst(“LabelXml”, “Labels”, “LabelName = ‘Address'”)
            Set Label = Framework.OpenLabelXml(LabelXml)

            ‘ populate data to be printed
            Set LabelSet = CreateObject(“DYMO.Label.Framework.Com.LabelSetBuilder”)
            ‘ you can add multiple ‘records’ into a label set. Each record represents data for one label to be printed
            Set LabelRecord = LabelSet.AddRecord()
            ‘ each record might contain several ‘fields’ contain data for one label object, in the case below for ‘ADDRESS’ object
            Call LabelRecord.AddText(“ADDRESS”, LabelText.Value)

            ‘ create print parameters
            Set PrintParams = CreateObject(“DYMO.Label.Framework.LabelWriterPrintParams”)
            PrintParams.PrintQuality = LabelWriterPrintQuality_BarcodeAndGraphics
            PrintParams.RollSelection = RollSelection_Auto

            Call Label.PrintLabelSet(Printer, PrintParams, LabelSet.XML)

            End Sub

  18. please suggest me what need to do
    I have 7.8 version installed
    I am using interopdymo.dll into refrences & using VS2013

    Unable to cast COM object of type ‘Dymo.DymoAddInClass’ to interface type ‘Dymo.IDymoAddin6’. This operation failed because the QueryInterface call on the COM component for the interface with IID ‘{0C7AADEF-16FC-400D-A827-3F7A93A94DF7}’ failed due to the following error: No such interface supported (Exception from HRESULT: 0x80004002 (E_NOINTERFACE)). ,Stack Trace: at System.StubHelpers.StubHelpers.GetCOMIPFromRCW(Object objSrc, IntPtr pCPCMD, IntPtr& ppTarget, Boolean& pfNeedsRelease)

    what need to change so i can create Dymo.DymoAddIn object & use its methods.


  19. Hello,

    I am having issues running asp.net/vb.net web app. It works locally in local host, but once deployed to stage server, i am getting:

    Windows 2012, target x86.

    Creating an instance of the COM component with CLSID {09DAFAE2-8EB0-11D2-8E5D-00A02415E90F} from the IClassFactory failed due to the following error: 80040154 Class not registered (Exception from HRESULT: 0x80040154 (REGDB_E_CLASSNOTREG)).

    Please help.


  20. Here is my code:

    Public DymoAddIn As DYMO.DymoAddIn = New DYMO.DymoAddIn
    Public DymoLabels As DYMO.DymoLabels = New DYMO.DymoLabels

    If DymoAddIn.OpenURL(txtLabelUrl.Text) Then

    ‘set printer

    ‘set label object
    DymoLabels.SetField(txtObjectName.Text, txtObjectData.Text)

    Dim TraySelection As Integer = 2

    ‘ check if selected/current printer is a twin turbo printer
    Dim twinTurbo As Boolean = DymoAddIn.IsTwinTurboPrinter(txtPrinterName.Text)
    If twinTurbo Then
    ‘ show the current tray selection if the printer
    ‘ is a twin turbo
    Dim i As Integer = DymoAddIn.GetCurrentPaperTray()
    If i = 0 Then
    TraySelection = 0 ‘ left tray
    ElseIf i = 1 Then
    TraySelection = 1 ‘ right tray
    ElseIf i = 2 Then
    TraySelection = 2 ‘ auto switch
    TraySelection = 2 ‘ tray selection not set, so default to auto switch
    End If
    End If

    DymoAddIn.Print2(1, False, TraySelection)

    End If

    • Hi Al…

      Based on your error message it looks like you may not have DLS installed on your stage server. Try to install DLS there, print a label from DLS to make sure everything is good and then retry your code.


  21. Creating an instance of the COM component with CLSID from the IClassFactory failed due the following : 80040154 for C# desktop based application.

    I have installed Dymo 8.0.0 in our system. please suggest what we can do to fix this issue,

    • Please install the latest DLS (DYMO Label Software) 8.5.1 which can be found here http://download.dymo.com/dymo/Software/Win/DLS8Setup.8.5.1.exe

      Are you running your C# application in a client-server environment? If yes, are the printers locally attached or at the server side? Where has DLS been installed? What kind of OS are you using?

      Are you able to print from DLS?

      • thanks for your prompt reply,

        i am developer, i dont have attached printer with my VDI locally,we are sharing the exe to the user and those user are in the factory when they use the application they will have the printer installed with them.

        but i am getting errror while developing the applcation

      • Hi ,

        I am using windows -7 OS,
        DLS installed at client machines
        DYMO software installed at development machine as well, currently i am using 8.2.0 but i am failed to fix this issue, please suggest

      • The COM error indicates that the required DYMO COM binaries can’t be found. Either DLS isn’t being installed or it is an access/security issue. Sometimes an AntiVirus/Security software is causing such an issue.

        Your are running an old DLS version. I strongly recommend to use the latest DLS 8.5.1 version and make sure that you can print from DLS.

  22. Hi,

    I tried to print label with bar code of 15 character ,which I was pass from the program.The problem is ,while printing the label the bar code part shows the error message that ” the text is too large”.

    • Hi,

      You will need to adjust the size of your barcode object in your label file. Once the data is too big for the object, this message is displayed. The only solution is to adjust the size of your barcode object.

  23. What happened to the idymoadd.in.show method??

    • The DLS SDK IDymoAddIn.Show() function has been deprecated to no-op. If your existing application depends on the deprecated feature, then you are required to run DLS 7.

  24. I use these 2 parts in my code to print a lable with the dymo 450.:

    Private Sub LabelTestDymo450ToolStripMenuItem_Click(sender As Object, e As EventArgs) Handles LabelTestDymo450ToolStripMenuItem.Click
    ‘Vul de aangewezen tekstvakken toe met betreffende teksten om het label aan te maken als betreffende comboboxen zijn ingevuld
    If ComboBox2.Text “Kies flake soort!!!!” Then
    printlabels(“Lijn Nr.: ” & txtProductielijn1.Text, “Product.: ” & ComboBox2.Text, “Batch Nr.: ” & txtFlakeBatchNr1.Text, 1)
    End If

    If ComboBox3.Text “Kies flake soort!!!!” Then
    printlabels(“Lijn Nr.: ” & txtProductielijn2.Text, “Product.: ” & ComboBox3.Text, “Batch Nr.: ” & txtFlakeBatchNr2.Text, 1)
    End If
    printlabels(“Lijn Nr.: ” & txtProductielijn1.Text, “Product.: ” & ComboBox1.Text, “Batch Nr.: ” & txtBatchNr.Text, 1)
    End Sub

    Public Shared Sub printlabels(ByVal labeltext As String, ByVal labeltext1 As String, ByVal labeltext2 As String, ByVal labnum As Integer)
    ‘Creëer objecten om label via Dymo dll’s aan te spreken.
    Dim myDymo As Object = CreateObject(“Dymo.Dymoaddin”) ‘geeft fout bij label printer labo
    Dim myLabel As Object = CreateObject(“Dymo.Dymolabels”) ‘geeft fout bij label printer labo
    ‘Laad het bestemde label vanuit locatie
    myDymo.Open(CStr(txtlocation & “\Small30334.label”))
    ‘Address en Address_1 en Address_2
    ‘Gebruik de taqnamen in Dymo software van het label om deze aangepast te krijgen.

    myLabel.SetField(“Address”, labeltext)
    myLabel.SetField(“Address_1”, labeltext1)
    myLabel.SetField(“Address_2”, labeltext2)
    ‘Afdruk aantal van het label.
    myDymo.Print(labnum, True)
    End Sub

    I tryed it on 2 laptops without any problems.
    But the third laptop gives me the error that there cannot be a active x control created.
    It points to these line.:

    Dim myDymo As Object = CreateObject(“Dymo.Dymoaddin”) ‘geeft fout bij label printer labo
    Dim myLabel As Object = CreateObject(“Dymo.Dymolabels”) ‘geeft fout bij label printer labo

    What can be the problem on the third laptop?

    • Hello Pascal,

      I am sorry you are having this issue. My guess is that you do not have DLS installed on the third laptop. Try installing DLS and let me know if the problem persists.


  25. Where is RESULTS defined for the IsPrinterOnline() function ?

    I am testing this function with printer and get a response of -1 if printer is connected, but 0 if it is not.
    That seems strange.

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