在播放窗体的PAINT事件中加上下面代码
PAINTSTRUCT ps;
HDC hdc;
TCHAR szHello[200]="Hello world";
hdc = BeginPaint(hWnd, &ps);
// TODO: Add any drawing code here...
RECT rt;
GetClientRect(hWnd, &rt);
DrawText(hdc, szHello, strlen(szHello), &rt, DT_CENTER);
EndPaint(hWnd, &ps);
其中hWnd是播放窗口的hWnd