Event handler used to prevent the TreeView from being collapsed.

C# | Visual Basic | Visual C++ |
private void BeforeTreeViewCollapse( Object sender, TreeViewCancelEventArgs e )
Private Sub BeforeTreeViewCollapse ( _ sender As Object, _ e As TreeViewCancelEventArgs _ )
private: void BeforeTreeViewCollapse( Object^ sender, TreeViewCancelEventArgs^ e )

- sender (Object)
- The sender of the event.
- e (TreeViewCancelEventArgs)
- The event arguments.