MSG_FULL_SCREEN
Window()->PostMessage(MSG_FULL_SCREEN);
fToolBar->SetActionVisible(MSG_FULL_SCREEN, fFullScreen);
fToolBar->AddAction(MSG_FULL_SCREEN, this,
fToolBar->SetActionVisible(MSG_FULL_SCREEN, false);
MSG_FULL_SCREEN, B_ENTER, 0, this);
_MarkMenuItem(menu, MSG_FULL_SCREEN, fFullScreen);
case MSG_FULL_SCREEN: