| Macros | |
| #define | GW_LEFT_PLANE 0x0100 | 
| #define | GW_RIGHT_PLANE 0x0200 | 
| #define | GW_BOTTOM_PLANE 0x0400 | 
| #define | GW_TOP_PLANE 0x0800 | 
| #define | GW_FRONT_PLANE 0x1000 | 
| #define | GW_BACK_PLANE 0x2000 | 
| #define | GW_PLANE_MASK 0x3f00 | 
| #define GW_LEFT_PLANE 0x0100 | 
| #define GW_RIGHT_PLANE 0x0200 | 
| #define GW_BOTTOM_PLANE 0x0400 | 
| #define GW_TOP_PLANE 0x0800 | 
| #define GW_FRONT_PLANE 0x1000 | 
| #define GW_BACK_PLANE 0x2000 | 
| #define GW_PLANE_MASK 0x3f00 |