Adds an event handler for the "beforeCheck" event notification.
[Visual Basic] Public Sub AddOnBeforeCheck( _ ByVal handler As TreeViewCancelEventHandler _ ) [C#] public void AddOnBeforeCheck( TreeViewCancelEventHandler handler ); [C++] public: void AddOnBeforeCheck( TreeViewCancelEventHandler* handler ); [JScript] public function AddOnBeforeCheck( handler : TreeViewCancelEventHandler );
TreeView Class | TreeView Members | System.WinForms Namespace