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Q44418: Switching Out of PM Application Hangs System under Codeview

Article: Q44418
Product(s): See article
Version(s): 2.20
Operating System(s): OS/2
Keyword(s): ENDUSER | | mspl13_basic
Last Modified: 16-MAY-1989

Question:

I am using CodeView to debug my Presentation Manager (PM) application.
Why does my machine sometimes hang when I use CTRL+ESC to switch to
the OS/2 program selector?

Response:

Presentation Manager applications require the use of the Presentation
Manager shell. To debug PM applications, CodeView must put hooks into
the Presentation Manager before the PM application is executed. This
process works properly while inside CodeView, but if you try to switch
back to the program selector, PM is in an unknown execution state.

Therefore, to switch out of CodeView while debugging a PM application,
you must first restart or end the program inside CodeView. This tells
CodeView to restore the Presentation Manager to its original
condition.

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