[StructLayout (LayoutKind.Sequential)]
	public struct SAFECOMMANDREC
	{
		public uint CellIndex;
		public uint ValIndex;
		public ushort ActualCommand;
		public ushort ACIndex;
		[MarshalAs (UnmanagedType.ByValArray, SizeConst=51)]
		public byte[] StringVal;
	}

	[StructLayout (LayoutKind.Sequential)]
	public class PROD_LIST {
		public byte cell_address;
		public byte product_id;
		[MarshalAs (UnmanagedType.ByValArray, SizeConst=17)]
		public byte[] prod_name;
		public Int16 model;
		public Int16 algo1;
		public Int16 algo2;
		public Int16 password1;
		public Int16 password2;
	}

	[StructLayout (LayoutKind.Sequential)]
	public class PROD_LIST_PTR {
		[MarshalAs (UnmanagedType.ByValArray, SizeConst=14)]
		public PROD_LIST[] plists;
	}

[DllImport("dusafe32.dll", CharSet=CharSet.Ansi, EntryPoint="GenerateUpdateStr")]
public static extern ushort GenerateUpdateStr(byte[] packet, SAFECOMMANDREC[] commands,	
short count, byte[] updatestr, PROD_LIST_PTR products, int scrambleorder);