How to check if a new window is opened in c++

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Hello,
While making a program I encountered a problem. I want that during the execution time of my program if a new window is opened on my laptop screen then my program should print 1 and do this for every new window opened until I close the program.
Thank you

Posted 15-Jan-16 0:40am

Suryakant Turing

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Jochen Arndt · Answer 1 · 2016-01-15T01:11:00

Solution 1

You can install a hook procedure using the SetWindowsHookEx function[^].

The best procedure type for your request will be probably WH_CALLWNDPROCRET. From inside the procedure handler check for a message that is involved with window creation like WM_CREATE.

Posted 15-Jan-16 1:11am

Jochen Arndt

_Asif_ · Answer 2 · 2016-01-15T02:22:00

Another idea is to catch WM_NCPAINT Message, WM_NCPAINT message means your window frame has been invalidated because other window might have overlapped, this could be tricky because WM_NCPAINT message can also be triggered when no window overlapped. Check this for further details.

WM_NCPAINT message (Windows)[^]