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Resolved Handling events on non-visual COM objects

  1. How-to
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  1. Daniel Vivier
    Daniel Vivier
  2. PowerBuilder
  3. Friday, 20 May 2022 22:15 PM UTC

Am I right in thinking that if I have a non-visual COM object, that I can connect to with ConnectToNewObject on an OleObject, there is no way to see or process events that it might throw?

I know about using a user object OleObject so I can catch the Error and ExternalException events, but that doesn't cover any custom events that the COM object defines.

I also know about the ways to use visual ActiveX objects and see their events. 

Thanks.

  1. COM
  2. Event Handling
  3. PowerBuilder (Appeon)
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Responses (1)
Bruce Armstrong
Bruce Armstrong Accepted Answer Pending Moderation
  1. Friday, 20 May 2022 23:48 PM UTC
  2. PowerBuilder
  3. # 1

Take a look at the answer I gave here (bottom of the page):

https://community.appeon.com/index.php/qna/q-a/handling-events-fired-by-ole-object

Comment
Daniel Vivier
  1. Daniel Vivier
  2. Saturday, 21 May 2022 00:03 AM UTC
Thanks, Bruce, though clearly that would be a LOT of work. You'd have to really need it and have no better way to achieve the same results with either a visual COM object or a nonvisual one without events.
  1. Helpful
Bruce Armstrong
  1. Bruce Armstrong
  2. Saturday, 21 May 2022 00:15 AM UTC
Visual COM objects were simpler when Microsoft still supported the interop forms toolkit However, that's gone the way of the dodo.
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