XSetPlaneMask(display, gc, plane_mask)
      Display *display;
      GC gc;
      unsigned long plane_mask;
| display | Specifies the connection to the X server. | 
| gc | Specifies the GC. | 
| plane_mask | Specifies the plane mask. | 
| BadAlloc | The server failed to allocate the requested source or server memory. | 
| BadGC | A value for a GContext argument does not name a defined GContext. |