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);