Method of Monitoring a Workbook's Addin Collection

Hi Everybody,

I'm trying to write a sub routine that execute immediately after a particular Addin is installed or uninstalled. The Addin in question is closed source, so I can not add methods or events directly to it.

Can anybody suggest an approach?

Thanks,
Chris

You can create an application object as "withevents" in the thisworkbook module of whatever you're writing your macro in (workbook, addin, etc...) and set up the WorkbookAddinInstall event in it. Basically just set up some code like so:

Private WithEvents XLApp as Excel.Application

Sub SetUpAddInWatch()
Set XLApp = Application
End Sub

Private Sub XLApp_WorkbookAddinInstall(ByVal Wb As Workbook)
'Execute your code here to see if the addin has been installed
End Sub

Private Sub XLApp_WorkbookAddinUninstall(ByVal Wb As Workbook)
'Execute more code here when the addin is uninstalled
End Sub

Note that when your addin/workbook opens (the one you're writing) you need to call the SetUpAddinWatch sub to set a reference to the Excel application object. You can make this call like so (put this code in the ThisWorkbook module as well)

Private Sub Workbook_Open()
SetUpAddInWatch
End Sub

You can avoid the call to SetUpAdinWatch by putting that code directly in Wokbook_Open.

But ... this technique assumes that this workbook gets opened befoea all the addins.

Thank you both so much for your help. This approach works perfectly.

Cheers,
Chris