Hi,

Thank you for posting in our forums.

The Ribbon application menus have a CloseUp method, which will close the application menu if it is open. Depending on what style of the application menu you use, you should use either:

            ultraToolbarsManager1.Ribbon.ApplicationMenu.CloseUp();

or

            ultraToolbarsManager1.Ribbon.ApplicationMenu2010.CloseUp();

Please let me know if you have any additional questions.