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| Definition for 16-bit programs:
| | Moved to [http://www.edm2.com/index.php/WinQueryExtIdFocus] |
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| USHORT EXPENTRY WinQueryExtIdFocus(PUSHORT pSessionId);
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| Definition for 32-bit programs:
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| USHORT APIENTRY16 WIN16QUERYEXTIDFOCUS(PUSHORT pSessionId);
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| #define WinQueryExtIdFocus WIN16QUERYEXTIDFOCUS
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| Notes:
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| When the Session Manager switches to another session (because of a DosSMSwitch() call), it calls internally WinSetExtIdFocus() too, if PM is present, to notify it about session switching. This API can be used to query the last session told to PM.
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| Experiment shows that this API can be used to see if PM is the current foreground full-screen session, or not. The DosQuerySysState() API with the parameter QSV_FOREGROUND_FS_SESSION should return the session ID of the current foreground session, which is always 1 for PM. Unfortunately, it returns some other session ID, because it changes as the user changes focus between windowed VIO applications.
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| The WinQueryExtIdFocus() returns the same session ID that is returned by DosQuerySysState() when the PM is in foreground, but returns a different one, if PM is in the background.
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