IsChanged property: Tree class
Description
This property returns True if the tree has been changed but not saved, False if the tree is unchanged.
This property can be used only with an open tree, that is, you must open the tree using the Open method before you can use this property.
This property is read-only.
Example
If &MyTree.IsChanged Then
&MyTree.Save();
End-if;
&MyTree.Close();