How to monitor a window's position with Win32?

Question

I need to draw an overlay using WPF on top of a number of Win32 windows. In order to draw the overlay in the correct place, I will need to hook into the window move, but have no idea how to do this. Which Win32 calls should I be looking at?

Answer 1

SetWinEventHook

var hook = SetWinEventHook(EVENT_SYSTEM_MOVESIZESTART,    
    EVENT_SYSTEM_MOVESIZEEND, NULL, WinEventProc, 
    0, 0, WINEVENT_OUTOFCONTEXT | WINEVENT_SKIPOWNPROCESS);