ScreenToClient

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
);

Parameters

hWnd

Identifies the window whose client area will be used for the conversion.

lpPoint

Points to a POINT structure that contains the screen coordinates to be converted.

Return Values

If the function succeeds, the return value is nonzero.

If the function fails, the return value is zero.

Remarks

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.

See Also

ClientToScreen, MapWindowPoints, POINT

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