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How to install an Excel Add-in (XLA or XLL) with Automation

This article was previously published under Q280290
This article illustrates how to install an Excel Add-in (xla or xll) with Automation.
The following code demonstrates how to use Automation to:
  • Add a new workbook.
  • Call the Add method of the AddIns collection to add the new add-in to the list of add-ins in Excel Add-In Manager.
  • Set the Install property of the AddIn object to True (equivalent to selecting the add-in the Add-in Manager).
    Dim oXL As Object, oAddin As ObjectSet oXL = CreateObject("Excel.Application")oXL.Workbooks.AddSet oAddin = oXL.AddIns.Add("C:\test.xla", True)oAddin.Installed = TrueoXL.QuitSet oXL = Nothing					
    Note that a workbook is added prior to calling the Add method in this example. The Add-in Manager in Excel is not available unless there is at least one visible workbook open. Without this line of code, you receive one of the following error messages:
    Run-time error '1004':
    Unable to get the Add property of the AddIns class
    Run-time error '1004':
    Add method of addins class failed.
For more information, click the following article numbers to view the articles in the Microsoft Knowledge Base:
161439 XL97: How to Remove Entries from Add-Ins Dialog Box
211956 XL2000: Cannot Delete Entries from Add-Ins Dialog Box
1004 runtime run-time error kbofficeprog addin

Article ID: 280290 - Last Review: 06/10/2005 17:51:35 - Revision: 5.2

  • Microsoft Office Excel 2003
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