public static extern ushort HWGetSerial(ref HwClass.HWDeviceInfo pBaseInfo, ref int uPenMsg, IntPtr hWnd, ref HwClass.HWSignPad pSignPad);
public static extern ushort HWInit(ref HwClass.HWDeviceInfo pBaseInfo, ref int uPenMsg, IntPtr hWnd);
public static extern ushort HWGetSerial(ref HwClass.HWDeviceInfo pBaseInfo, ref int uPenMsg, IntPtr hWnd, ref HwClass.HWSignPad pSignPad);
public static extern ushort HWInit(ref HwClass.HWDeviceInfo pBaseInfo, ref int uPenMsg, IntPtr hWnd);