IltmmPlay::ToggleCloseCaptioning Example for C

VARIANT_BOOL vrtClose; 

IltmmPlay__put_CloseCaptioning(g_player, VARIANT_FALSE); 
IltmmPlay_ToggleCloseCaptioning(g_player); 
IltmmPlay__get_CloseCaptioning(g_player, &vrtClose); 
  if (vrtClose == VARIANT_TRUE) 
            MessageBox(hwnd, "Close captioning rendering is enabled", NULL, MB_OK); 
  else
            MessageBox(hwnd, "Close captioning rendering is disabled", NULL, MB_OK);