_CreateBehindHookLayer(void *LayersBase, struct Layer_Info *li, struct BitMap *bm, long x0, long y0, long x1, long y1, long flags, struct Hook *hook, struct BitMap *bm2)
_CreateUpfrontHookLayer(void *LayersBase, struct Layer_Info *li, struct BitMap *bm, long x0, long y0, long x1, long y1, long flags, struct Hook *hook, struct BitMap *bm2)