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