Converts (maps) a set of points from the coordinate space of the CWnd to the coordinate space of another window.
void MapWindowPoints(
   CWnd* pwndTo,
   LPRECT lpRect 
) const;
void MapWindowPoints(
   CWnd* pwndTo,
   LPPOINT lpPoint,
   UINT nCount 
) const;
Parameters
- pwndTo 
 Identifies the window to which points are converted. If this parameter is NULL, the points are converted to screen coordinates.
- lpRect 
 Specifies the rectangle whose points are to be converted. The first version of this function is available only for Windows 3.1 and later.
- lpPoint 
 A pointer to an array of POINT structures that contain the set of points to be converted.
- nCount 
 Specifies the number of POINT structures in the array pointed to by lpPoint.
Requirements
Header: afxwin.h