public static extern int SendMessage(IntPtr hWnd, APIsEnums.HeaderControlMessages msg, int wParam, ref APIsStructs.HDITEM lParam);
public static extern int SendMessage(IntPtr hWnd, APIsEnums.HeaderControlMessages msg, IntPtr wParam, ref APIsStructs.HD_HITTESTINFO hd_hittestinfo);
internal static extern int SendMessage(HandleRef hWnd, APIsEnums.HeaderControlMessages msg, IntPtr wParam, ref APIsStructs.HDITEM lParam);