XSetState(display, gc, foreground, background, function, plane_mask)
      Display *display;
      GC gc;
      unsigned long foreground, background;
      int function;
      unsigned long plane_mask;
| display | Specifies the connection to the X server. | 
| gc | Specifies the GC. | 
| foreground | Specifies the foreground you want to set for the specified GC. | 
| background | Specifies the background you want to set for the specified GC. | 
| function | Specifies the function you want to set for the specified 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. | 
| BadValue | Some numeric value falls outside the range of values accepted by the request. Unless a specific range is specified for an argument, the full range defined by the argument's type is accepted. Any argument defined as a set of alternatives can generate this error. |