[python-win32] OnItemSend cancel help

[Mark Hammond]

In general, you should simply return the value of that variable.  You didn't
include the next line of the makepy snippet which includes the types, but a
possibility is that the event handler is actually a function rather than a
"sub" - so maybe something like:

return 0, True

should be used - returning 0 for the function itself, with the True being
for cancel.

Wish I could be more help...

Mark
  -----Original Message-----
  From: python-win32-bounces at python.org
[mailto:python-win32-bounces at python.org]On Behalf Of d tiu
  Sent: Friday, 10 November 2006 7:15 AM
  To: python-win32 at python.org
  Subject: [python-win32] OnItemSend cancel help


  Hi all,
  I'm writing an outlook addin, trying to stop email sends on certain
  conditions.  I'm using OnItemSend callbacks that has a cancel
  parameter which if set to True, will cancel the send.  It's not
  working :(.  I'm calling:
   self.applicationEvents = DispatchWithEvents(application,
ApplicationEvent)
  with
   class ApplicationEvent:
     def OnItemSend(self, item, cancel):
        print "OnItemSend"
        cancel = True
  and desperate, also tried:
   class ApplicationEvent:
     def OnItemSend(self, item, cancel):
        print "OnItemSend"
        cancel = True
        return cancel

  I've confirmed that the handler is getting called, but the cancel
  parameter seems like it's not getting back to outlook.

  The makepy has
  #  def OnItemSend(self, Item=defaultNamedNotOptArg,
  Cancel=defaultNamedNotOptArg):
  as the prototype on gen_py\ApplicationEvents.py.

  Any ideas?  One thing is that the VB call is
   Sub object_ItemSend(ByVal Item As Object, Cancel As Boolean)
  which I suspect Cancel is passed by reference?  If so, is this handled
  by the mechanisms in DispathWithEvents?  If not, how does one do it?

  Thanks
  Dave
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