The following example shows how to cancel the ItemSend event in response to user input.
Private Sub myOlApp_ItemSend(ByVal Item As Object, Cancel As Boolean)
Prompt$ = "Are you sure you want to send " & Item.Subject & "?"
If MsgBox(Prompt$, vbYesNo + vbQuestion, "Sample") = vbNo Then
Cancel = True
End If
End Sub