How to detect what window/control is at a specific point onscreen?

Question

Is there a Win32 API call to determine what window and/or control is visible at a certain coordinates and/or under the mouse?

Answer 1

You can use GetWindowFromPoint. It will return the window handle so you can than use GetClassName function to see which control it is.

here is an example: http://support.microsoft.com/kb/112649

Answer 2

Use the WindowFromPoint, ChildWindowFromPoint or ChildWindowFromPointEx Win32 functions.