InputManager.PopMenuMode Method (PresentationSource)
Called by components to leave menu mode.
Assembly: PresentationCore (in PresentationCore.dll)
A component calls this method to leave the input manager’s menu mode. The menuSite releases privileged access to window messages.
Calling this method causes the internal count of open menus to decrement and sets the IsInMenuMode property to false, if this is the last menu to close.
Available since 4.0