Some question about destroy widgets.

In a class, i have a variable such as MyGUI::StaticImagePtr mBetPanelImage; Initialize like this:
mBetPanelImage = getGUI()->createWidget<MyGUI::StaticImage>("StaticImage", 0, 554, 286, 214, MyGUI::Align::Default, "Info");
mBetPanelImage->setImageTexture("BetPanel.png");
mBetPanelImage->setVisible(true);

When my program exit, need I to destroy this widget?

no

Thank you!