Function SetMetaRgn 

pub unsafe extern "system" fn SetMetaRgn(hdc: *mut c_void) -> i32

METAFILE#6 SetMetaRgn

If the current metaregion is null, it is set to the current clipping region. Otherwise, the current metaregion is intersected with the current clipping region, and the result is the new metaregion

See also

• MS-EMF:v14 2.3.2 Clipping Record Types