private void WriteModuleRecord(BinaryWriter bw, ExcelVBAModule module)
        {
            bw.Write((ushort)0x19);
            bw.Write((uint)module.Name.Length);
            bw.Write(Encoding.GetEncoding(CodePage).GetBytes(module.Name));     //Name

            bw.Write((ushort)0x47);
            bw.Write((uint)module.Name.Length*2);
            bw.Write(Encoding.Unicode.GetBytes(module.Name));                   //Name

            bw.Write((ushort)0x1A);
            bw.Write((uint)module.Name.Length);
            bw.Write(Encoding.GetEncoding(CodePage).GetBytes(module.Name));     //Stream Name  

            bw.Write((ushort)0x32);
            bw.Write((uint)module.Name.Length*2);
            bw.Write(Encoding.Unicode.GetBytes(module.Name));                   //Stream Name

            module.Description = module.Description ?? "";
            bw.Write((ushort)0x1C);
            bw.Write((uint)module.Description.Length);
            bw.Write(Encoding.GetEncoding(CodePage).GetBytes(module.Description));     //Description

            bw.Write((ushort)0x48);
            bw.Write((uint)module.Description.Length*2);
            bw.Write(Encoding.Unicode.GetBytes(module.Description));                   //Description

            bw.Write((ushort)0x31);
            bw.Write((uint)4);
            bw.Write((uint)0);                              //Module Stream Offset (No PerformanceCache)

            bw.Write((ushort)0x1E);
            bw.Write((uint)4);
            bw.Write((uint)module.HelpContext);            //Help context ID

            bw.Write((ushort)0x2C);
            bw.Write((uint)2);
            bw.Write((ushort)0xFFFF);            //Help context ID

            bw.Write((ushort)(module.Type == eModuleType.Module ? 0x21 : 0x22));
            bw.Write((uint)0);

            if (module.ReadOnly)
            {
                bw.Write((ushort)0x25);
                bw.Write((uint)0);              //Readonly
            }

            if (module.Private)
            {
                bw.Write((ushort)0x28);
                bw.Write((uint)0);              //Private
            }

            bw.Write((ushort)0x2B);             //Terminator
            bw.Write((uint)0);              
        }
        private void ReadDirStream()
        {
            byte[] dir = CompoundDocument.DecompressPart(Document.Storage.SubStorage["VBA"].DataStreams["dir"]);
            MemoryStream ms = new MemoryStream(dir);
            BinaryReader br = new BinaryReader(ms);
            ExcelVbaReference currentRef = null;
            string referenceName = "";
            ExcelVBAModule currentModule = null;
            bool terminate = false;
            while (br.BaseStream.Position < br.BaseStream.Length && terminate == false)
            {
                ushort id = br.ReadUInt16();
                uint size = br.ReadUInt32();
                switch (id)
                {
                    case 0x01:
                        SystemKind = (eSyskind)br.ReadUInt32();
                        break;
                    case 0x02:
                        Lcid = (int)br.ReadUInt32();
                        break;
                    case 0x03:
                        CodePage = (int)br.ReadUInt16();
                        break;
                    case 0x04:
                        Name = GetString(br, size);
                        break;
                    case 0x05:
                        Description = GetUnicodeString(br, size);
                        break;
                    case 0x06:
                        HelpFile1 = GetString(br, size);
                        break;
                    case 0x3D:
                        HelpFile2 = GetString(br, size);
                        break;
                    case 0x07:
                        HelpContextID = (int)br.ReadUInt32();
                        break;
                    case 0x08:
                        LibFlags = (int)br.ReadUInt32();
                        break;
                    case 0x09:
                        MajorVersion = (int)br.ReadUInt32();
                        MinorVersion = (int)br.ReadUInt16();
                        break;
                    case 0x0C:
                        Constants = GetUnicodeString(br, size);
                        break;
                    case 0x0D:
                        uint sizeLibID = br.ReadUInt32();
                        var regRef = new ExcelVbaReference();
                        regRef.Name = referenceName;
                        regRef.ReferenceRecordID = id;
                        regRef.Libid = GetString(br, sizeLibID);
                        uint reserved1 = br.ReadUInt32();
                        ushort reserved2 = br.ReadUInt16();
                        References.Add(regRef);
                        break;
                    case 0x0E:
                        var projRef = new ExcelVbaReferenceProject();
                        projRef.ReferenceRecordID = id;
                        projRef.Name = referenceName;
                        sizeLibID = br.ReadUInt32();
                        projRef.Libid = GetString(br, sizeLibID);
                        sizeLibID = br.ReadUInt32();
                        projRef.LibIdRelative = GetString(br, sizeLibID);
                        projRef.MajorVersion = br.ReadUInt32();
                        projRef.MinorVersion = br.ReadUInt16();
                        References.Add(projRef);
                        break;
                    case 0x0F:
                        ushort modualCount = br.ReadUInt16();
                        break;
                    case 0x13:
                        ushort cookie = br.ReadUInt16();
                        break;
                    case 0x14:
                        LcidInvoke = (int)br.ReadUInt32();
                        break;
                    case 0x16:
                        referenceName = GetUnicodeString(br, size);
                        break;
                    case 0x19:
                        currentModule = new ExcelVBAModule();
                        currentModule.Name = GetUnicodeString(br, size);
                        Modules.Add(currentModule);
                        break;
                    case 0x1A:
                        currentModule.streamName = GetUnicodeString(br, size);
                        break;
                    case 0x1C:
                        currentModule.Description = GetUnicodeString(br, size);
                        break;
                    case 0x1E:
                        currentModule.HelpContext = (int)br.ReadUInt32();
                        break;
                    case 0x21:
                    case 0x22:
                        break;
                    case 0x2B:      //Modul Terminator
                        break;
                    case 0x2C:
                        currentModule.Cookie = br.ReadUInt16();
                        break;
                    case 0x31:
                        currentModule.ModuleOffset = br.ReadUInt32();
                        break;
                    case 0x10:
                        terminate = true;
                        break;
                    case 0x30:
                        var extRef = (ExcelVbaReferenceControl)currentRef;
                        var sizeExt = br.ReadUInt32();
                        extRef.LibIdExternal = GetString(br, sizeExt);

                        uint reserved4 = br.ReadUInt32();
                        ushort reserved5 = br.ReadUInt16();
                        extRef.OriginalTypeLib = new Guid(br.ReadBytes(16));
                        extRef.Cookie = br.ReadUInt32();
                        break;
                    case 0x33:
                        currentRef = new ExcelVbaReferenceControl();
                        currentRef.ReferenceRecordID = id;
                        currentRef.Name = referenceName;
                        currentRef.Libid = GetString(br, size);
                        References.Add(currentRef);
                        break;
                    case 0x2F:
                        var contrRef = (ExcelVbaReferenceControl)currentRef;
                        contrRef.ReferenceRecordID = id;

                        var sizeTwiddled = br.ReadUInt32();
                        contrRef.LibIdTwiddled = GetString(br, sizeTwiddled);
                        var r1 = br.ReadUInt32();
                        var r2 = br.ReadUInt16();

                        break;
                    case 0x25:
                        currentModule.ReadOnly = true;
                        break;
                    case 0x28:
                        currentModule.Private = true;
                        break;
                    default:
                        break;
                }
            }
        }