SetWindowExtEx    
The SetWindowExtEx
function sets the horizontal and vertical extents of the window for a device
context by using the specified values. 
BOOL SetWindowExtEx(
|     HDC hdc, | // handle of device
  context  | 
|     int nXExtent, | // new horizontal
  window extent   | 
|     int nYExtent, | // new vertical
  window extent  | 
|     LPSIZE lpSize  | // original window
  extent  | 
|    ); |  | 
Parameters
hdc
Identifies
the device context. 
nXExtent
Specifies the
window s horizontal extent in logical units. 
nYExtent
Specifies the
window s vertical extent in logical units. 
lpSize
Points to a SIZE structure. The previous
window extents (in logical units) are placed in this structure. If lpSize
is NULL, nothing is returned.
Return Values
If the
function succeeds, the return value is nonzero.
If the
function fails, the return value is zero. 
Remarks
When the
following mapping modes are set, calls to the SetWindowExtEx and SetViewportExtEx functions are ignored: 
    MM_HIENGLISH 
    MM_HIMETRIC 
    MM_LOENGLISH 
    MM_LOMETRIC 
    MM_TEXT 
    MM_TWIPS 
When
MM_ISOTROPIC mode is set, an application must call the SetWindowExtEx
function before calling SetViewportExtEx. 
See Also