switch (r.pr.msgType) {
			case PEN:
							remotePainter->FillRect(canvas, r.pr.X, r.pr.Y, 
								r.pr.X+r.pr.size-1, r.pr.Y-r.pr.size+1);
							break;
			case ERASER:
							output->ClearRect(canvas, r.er.X, r.er.Y,
								r.er.X+r.er.size-1, r.er.Y-r.er.size+1);
							break;
			case CURSOR:
							break;
			case TEXT:
							output->Text(canvas, r.tr.buf, r.tr.size, r.tr.X, r.tr.Y);
							break;
			case CLEAN:
							break;
			case DISC:
							printf("The remote user is exiting.\n");
							exit(0);
							break;
			default:
							printf("undefined msg type.\n");
							break;
			}