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