This function sets new flag(s) and returns old flag(s)
unsigned long PgSetControlFlagGCCx( PhGC_t * GC, unsigned long flags);
These flag(s) are used to control specific behavior that is associated with the provided PhGC_t.
You can set the following flags:
All old flags.
Ensure the flags are set to zero after you are finished, as these control flags alter rendering at the fundamental level.