| int SelectClipRgn(hdc, hrgn) | |||||
| HDC hdc; | /* handle of device context | */ | |||
| HRGN hrgn; | /* handle of region to be selected | */ | |||
The SelectClipRgn function selects the given region as the current clipping region for the specified device context.
hdc
Identifies the device context.
hrgn
Identifies the region to be selected.
The return value specifies the region's complexity. It can be any one of the following values:
| Value | Meaning |
| NULLREGION | Region is empty. |
| SIMPLEREGION | Region is a single rectangle. |
| COMPLEXREGION | Region is composed of multiple rectangles. |
| ERROR | Error occurred. (The previous clip region is not affected.) |
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 the given region are specified in device units.
ExtSelectClipRgn