Get all windows which overlap my window

问题

I want to find all windows which entirely or partly overlap my window (are on top of it). As a special case, if I have two window handles (hWnd1 and hWnd2), I want to find if hWnd2 partly or completely overlaps hWnd1. The windows in question are desktop windows (not children/siblings in the same process).

回答1:

Iterate the windows that might overlap yours by repeatedly calling GetWindow(), using GW_HWNDPREV. Use GetWindowRect() to check if such a window actually overlap yours. There's no shortcut for two known windows, just check if GetWindow() returns hWnd2 while iterating.

来源：https://stackoverflow.com/questions/2317008/get-all-windows-which-overlap-my-window