XDrawPoint(display, d, gc, x, y)
      Display *display;
      Drawable d;
      GC gc;
      int x, y;
| display | Specifies the connection to the X server. | 
| d | Specifies the drawable. | 
| gc | Specifies the GC. | 
|  x y  | Specify the x and y coordinates where you want the point drawn. | 
This function uses these GC components: function, plane-mask, foreground, subwindow-mode, clip-x-origin, clip-y-origin, and clip-mask.
XDrawPoint() can generate BadDrawable , BadGC , and BadMatch errors.
| BadDrawable | A value for a Drawable argument does not name a defined Window or Pixmap. | 
| BadGC | A value for a GContext argument does not name a defined GContext. | 
| BadMatch | An InputOnly window is used as a Drawable. | 
| BadMatch | Some argument or pair of arguments has the correct type and range but fails to match in some other way required by the request. |