The SetViewportExtEx function sets the horizontal and vertical extents of the viewport for a device context by using the specified values.
BOOL SetViewportExtEx(
| HDC hdc, | // handle of device context |
| int nXExtent, | // new horizontal viewport extent |
| int nYExtent, | // new vertical viewport extent |
| LPSIZE lpSize | // original viewport extent |
| ); |
Parameters
hdc
Identifies the device context.
nXExtent
Specifies the horizontal extent, in device units, of the viewport.
nYExtent
Specifies the vertical extent, in device units, of the viewport.
lpSize
Points to a SIZE structure. The previous viewport extents (in device 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 it calls SetViewportExtEx.
See Also