The ScreenToClient function converts the screen coordinates of a specified point on the screen to client coordinates.
BOOL ScreenToClient(
HWND hWnd, |
// window handle for source coordinates |
LPPOINT lpPoint |
// address of structure containing coordinates |
); |
If the function succeeds, the return value is nonzero.
If the function fails, the return value is zero. To get extended error information, call GetLastError.
The function uses the window identified by the hWnd parameter and the screen coordinates given in the POINT structure to compute client coordinates. It then replaces the screen coordinates with the client coordinates. The new coordinates are relative to the upper-left corner of the specified window’s client area.
The ScreenToClient function assumes the specified point is in screen coordinates.
ClientToScreen, MapWindowPoints, POINT
Questions:
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