-GWorldPtr wxMacCreateGWorld( int width , int height , int depth ) ;
-void wxMacDestroyGWorld( GWorldPtr gw ) ;
-PicHandle wxMacCreatePict( GWorldPtr gw , GWorldPtr mask = NULL ) ;
-CIconHandle wxMacCreateCIcon(GWorldPtr image , GWorldPtr mask , short dstDepth , short iconSize ) ;
-void wxMacSetColorTableEntry( CTabHandle newColors , int index , int red , int green , int blue ) ;
-CTabHandle wxMacCreateColorTable( int numColors ) ;
-
-// A mask is a mono bitmap used for drawing bitmaps
+// A mask is a bitmap used for drawing bitmaps
+// it can be a monochrome bitmap or a multi-bit bitmap which transfers to alpha channels