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excel object event handling
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Vladimir Kryachko (VIP)
Hello,

I need to handle an Excel.Workbook.BeforeClose event in my VB.NET
application. When the framework attempts to bind the event with my handler,
it throws a System.InvalidCastException with message "No such interface
supported".
I included the relevant declarations:

Imports Excel
....
Public Class TimeReportSheet
....
Private WithEvents excelWorkBook As Workbook
....
Public Sub Form(...

    Dim excelApp As Excel.Application = Nothing
    excelApp = New Excel.Application()
    ...
    excelWorkBook = excelApp.Workbooks.Add() ' the exception is thrown here
    ...
End Sub

Private Sub Workbook_BeforeCloseEventHandler(ByRef Cancel As Boolean)
Handles excelWorkBook.BeforeClose
    Cancel = False
End Sub
....
End Class

What do I wrong?

Thanx
Reply to this message...
 
    
Vladimir Kryachko
The answer is there:
Microsoft Knowledge Base Article - 316653
(http://support.microsoft.com/default.aspx?kbid=316653)

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System.InvalidCastException




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