How can I distinguish that user has press "X" or “Close Group”?

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Hi I have windows applications which when I press "X" or "Close” hwnd got from GetMessage is NULL. That is OK. But when I open some windows applications, they are building group on Taskbar. Which message will be sent when I select “Close Group” by windows XP?
How can I distinguish that user has press "X" or “Close Group”?

Thanks in advance
M.H

Posted 8-Nov-11 22:49pm

merh

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Chandrasekharan P 9-Nov-11 6:04am

Why don't you use the spy++ tool for this? it will help to see which all functions get called when you do different clicks and movement of the mouse

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Chuck O'Toole · Accepted Answer · 2011-11-09T03:45:00

I suspect that all close group does is loop over all the windows affected and sends a WM_CLOSE to each of them individually. In other words, it acts just like you went to each windows separately and clicked [X].

That would be the more likely implementation instead of going off and creating a new windows message and teaching every application how to process it. As the other person suggested, use SPY++ to watch what messages fly by when you do that to verify.