|Creates new menu item object which is child of
this menu item. The child is automatically added to the Subs collection.
VarioMenuItem.CreateSubItem(identifier) - returns the
newly created object
identifier - Identifier of newly created menu item object in the Subs collection. It can be anything holded in
VARIANT type - object, numeric value or string, but in most cases this will be a string.
This method is the only way of creating new menu item. You can use the returned value
to set properties of the menu item created. There is no need to make anything else with
it. The used identifier should be unique in the Subs collection of this object else error
is returned. Later you can enumerate Subs collection and use the identifier to make access
to the menu item's object.