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SelectClipRgn info  Overview  Group

The SelectClipRgn function selects a region as the current clipping region for the specified device context.

int SelectClipRgn(

    HDC hdc,

// handle of device context

    HRGN hrgn 

// handle of region to be selected

   );

Parameters

hdc
Identifies the device context.
hrgn
Identifies the region to be selected.

Return Values

The return value specifies the region’s complexity and can be any one of the following values:

Value

Meaning

NULLREGION

Region is empty.

SIMPLEREGION

Region is a single rectangle.

COMPLEXREGION

Region is more than one rectangle.

ERROR

An error occurred. (The previous clipping region is unaffected.)

To get extended error information, call GetLastError.

Remarks

Only a copy of the selected region is used. The region itself can be selected for any number of other device contexts or it can be deleted.

The SelectClipRgn function assumes that the coordinates for a region are specified in device units.

To remove a device-context’s clipping region, specify a NULL region handle.

See Also

ExtSelectClipRgn 


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