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SetViewportExtEx info  Overview  Group

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



Identifies the device context.
Specifies the horizontal extent, in device units, of the viewport.
Specifies the vertical extent, in device units, of the viewport.
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. To get extended error information, call GetLastError.


When the following mapping modes are set, calls to the SetWindowExtEx and SetViewportExtEx functions are ignored.

When MM_ISOTROPIC mode is set, an application must call the SetWindowExtEx function before it calls SetViewportExtEx.

See Also

GetViewportExtEx, SetWindowExtEx, SIZE 

See also:

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