XSetCommand(display, w, argv, argc)
      Display *display;
      Window w;
      char **argv;
      int argc;
| display | Specifies the connection to the X server. | 
| w | Specifies the window. | 
| argv | Specifies the application's argument list. | 
| argc | Specifies the number of arguments. | 
XSetCommand() can generate BadAlloc and BadWindow errors.
| BadAlloc | The server failed to allocate the requested source or server memory. | 
| BadWindow | A value for a Window argument does not name a defined Window. |