public static extern int SendMessage(IntPtr hWnd, TreeViewMessages msg, int wParam, ref TVHITTESTINFO hti);
public static extern int SendMessage(IntPtr hWnd, TreeViewMessages msg, int wParam, ref TVHITTESTINFO hti);
public static extern int SendMessage(IntPtr hWnd, TreeViewMessages msg, int wParam, ref TVHITTESTINFO hti);
public static extern int SendMessage(IntPtr hWnd, TreeViewMessages msg, int wParam, ref TVHITTESTINFO hti);