The WindowFromPoint function retrieves a handle to the window that contains the specified point.
HWND WindowFromPoint(
POINT Point // structure with point
);
The return value is a handle to the window that contains the point. If no window exists at the given point, the return value is NULL. If the point is over a static text control, the return value is a handle to the window under the static text control.
The WindowFromPoint function does not retrieve a handle to a hidden or disabled window, even if the point is within the window. An application should use the ChildWindowFromPoint function for a nonrestrictive search.
Windows NT: Requires version 3.1 or later.
Windows: Requires Windows 95 or later.
Windows CE: Requires version 1.0 or later.
Header: Declared in winuser.h.
Import Library: Use user32.lib.
Windows Overview, Window Functions, ChildWindowFromPoint, POINT, WindowFromDC