Hello,

I have a custom VSTO Addin with FormRegion. In that add_in I wan't to hook to the events triggered when a user presses Reply or Forward buttons of the inspector window running my FormRegion. To do this I do:

Private Sub ChoixProjetRegion_FormRegionShowing(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.FormRegionShowing

If TypeOf (Me.OutlookItem) Is Outlook.MailItem AND Me.OutlookFormRegion.FormRegionMode = Outlook.OlFormRegionMode.olFormRegionRead Then
AddHandler CType(Me.OutlookItem, Outlook.MailItem).Reply, (AddressOf OutlookApplication_ItemReply)

End If

End Sub



Private Sub OutlookApplication_ItemReply(ByVal Item As Object, ByRef Cancel As Boolean)
MsgBox("here")
End Sub

It works. I see My Message Box when I press Reply. The Problem Is that it only works the first two times. ie, on the reply window I close it, and press Reply again on the original window and I get my MsgBox again, followed by the reply window. I close it again, and click on Reply thisr time, but this time the Reply window comes on without the MsgBox.

If I keep closing the Reply window and pressing the Reply button again a few times, eventually I'll get:

"COM object that has been separated from its underlying RCW cannot be used."



Does anyone know what's going on?.
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