Specifies whether a user can close the toolbar.
virtual BOOL CanBeClosed() const;
TRUE if the toolbar can be closed by the user; otherwise FALSE.
The framework calls this method to determine whether the user can close a toolbar. If the method returns TRUE, the framework enables the SC_CLOSE command in the system menu of the toolbar and the user can close the toolbar by using a check box in the list of toolbars in the customization dialog box.
The default implementation returns TRUE. Override this method in a class derived from CMFCToolBar Class to make toolbar objects that cannot be closed by the user.