Screen change

[Maejie]

How can I detect desktop changes ?

I capture it with GetDesktopWindow(), while there are, for example, 4 open windows
Later I close one of them, I'd like to get that change right after I close that window. I mean another HWND should be reported.

Thank you

[ahmd]

GetDesktopWindow() won't help you in that. You should probably not use that API at all. To do what you want (if I understood your right) you will need a system-wide hook. Check description of the SetWindowsHookEx API for more info.

[Maejie]

Thank you but what should I hook ?

[Maejie]

So someone could tll me which hook ?

[Maejie]

Is this ignored because it is too easy for you ?

[Turingmachine]

Is this ignored because it is too easy for you ?

Hooking is not easy at all,
people ignore because they don't know, or maybe because they are afraid you will ruin thei MVP title , It is a cool commercial ads to spread around

[Maejie]

Thanks, I will search if there is another way to do instead of hooking
Until I can get the replies here and on other forums, I will make my skin thicker to asking more and more, I will also test how others mentally think about this too,

Thanks everyone for your time

[Turingmachine]

Thanks, I will search if there is another way to do instead of hooking
Until I can get the replies here and on other forums, I will make my skin thicker to asking more and more, I will also test how others mentally think about this too,

Thanks everyone for your time

Good!, it's good, but
Don't make it too thick as a human being,
Only animals like elephant will have thick skin

[ahmd]

Sorry, I didn't get an email notification about this one. I would use WH_CALLWNDPROC hook and try to catch WM_CLOSE messages sent to your windows of interest. But like Turingmachine pointed out, Windows hooks aren't a trivial thing. This one, most certainly, will have to be a global hook to monitor messages for processes other than yours, which means you will have to put it into a DLL. I haven't programmed Windows hooks since XP and I'm sure they added new restrictions to them under Vista and Windows 7. Study the link I gave you above. There's an example on how you can place a Windows hook there.

PS. What exactly are you trying to accomplish? Maybe there's an easier way to do it.