Dynamic control over treelist view

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I have a treelist view. (reused the class from Gerolf @ http://www.codeproject.com/treectrl/treelistctrlgerolf.asp) When I edit the value (thus the label) of a list item, the value of its parent/ child item are also affected. these values are update din the document but not in the tree view. Only the change in the selected item is updated, not the parent or child item. How can I make sure that all the affected list items labels are updated accordingly. If you have a sample code, it woudl be wonderful. Thanks!