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ScreenToClient info  Overview  Group

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. To get extended error information, call GetLastError.

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 

Questions:


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