iconPMap
CIcon structure
#include <Quickdraw.h>
typedef struct { Size Offset Description
PixMap iconPMap; 50 0 Pixel Map describing icon
BitMap iconMask; 14 50 Icon mask bitmap
BitMap iconBMap; 14 64 Icon bitmap
Handle iconData; 4 78 Handle to icon
short *iconMaskData; n 82 Data for bitmap and map
} CIcon ; 82+n
typedef CIcon *CIconPtr;
typedef CIcon **CIconHandle;

Notes: Color icons are used just like black and white icons. 'cicn' resources will
take precedence over 'ICON' resources whenever they're present. When
calculating n, above:
n=IconMask.rowBytes*height
Height=IconPMap.bounds.bottom-IconPmap.bounds.top
PlotIcon is used to draw a color icon already in RAM.