Fires the beforeExpand event.
[Visual Basic] Overridable Protected Sub OnBeforeExpand( _ ByVal e As TreeViewCancelEventArgs _ ) [C#] protected virtual void OnBeforeExpand( TreeViewCancelEventArgs e ); [C++] protected: virtual void OnBeforeExpand( TreeViewCancelEventArgs* e ); [JScript] protected function OnBeforeExpand( e : TreeViewCancelEventArgs );
TreeView Class | TreeView Members | System.WinForms Namespace