In default implementation the function returns false. You  can override this function in the derived class to indicate a value if the command object has a popup menu items' collection and this items are visible.  In BCGControlBar.NET library this function is overridden in class ToolBarMenuButton to specify the visibility of the related popup menu.

'Declaration
 
Public Overridable Function IsItemCollectionVisible() As Boolean

'Usage
 
Dim instance As CommandObject
Dim value As Boolean
 
value = instance.IsItemCollectionVisible()

public virtual bool IsItemCollectionVisible()

public: virtual bool IsItemCollectionVisible(); 

public:
virtual bool IsItemCollectionVisible();