public static extern void SendMessage(IntPtr hWnd, int msg, int wParam, ref TBBUTTON lParam);
public static extern void SendMessage(IntPtr hWnd, int msg, int wParam, ref TBBUTTON lParam);
public static extern void SendMessage(IntPtr hWnd, int msg, int wParam, ref TBBUTTON lParam);
public static extern void SendMessage(IntPtr hWnd, int msg, int wParam, ref TBBUTTON lParam);