Question

I want to write a program:

• click a window(some other program, like firefox, explorer..)
• get this window’s HWND
• do something to that window

My method is using PeekMessage to get event, but looks like PeekMessage only peek the message send from my program.

So how can I add a hook to all the other windows, or monitor global events?

Answer 1

SetWindowsHookEx, with the WH_MOUSE or possibly WH_MOUSE_LL flag. MFC itself doesn’t really have much to do with this, at least to my recollection (though, behind the scenes, MFC can/does install a hook, or maybe even more than one, itself).