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    <p>As @KeithMiller <a href="https://stackoverflow.com/a/10536263/11480">answered</a>, you are creating the file <code>'C:\Temp\123'</code> with an empty main stream and two alternate streams.</p> <p>My quick attempt at Delphi XE (so - Unicode!) code to show the stream names, based on the <a href="http://www.flexhex.com/docs/articles/alternate-streams.phtml" rel="nofollow noreferrer">article</a>:</p> <pre><code>type NTSTATUS = Cardinal; TFileInformationClass = ( FileDirectoryInformation = 1, FileFullDirectoryInformation, FileBothDirectoryInformation, FileBasicInformation, FileStandardInformation, FileInternalInformation, FileEaInformation, FileAccessInformation, FileNameInformation, FileRenameInformation, FileLinkInformation, FileNamesInformation, FileDispositionInformation, FilePositionInformation, FileFullEaInformation, FileModeInformation, FileAlignmentInformation, FileAllInformation, FileAllocationInformation, FileEndOfFileInformation, FileAlternateNameInformation, FileStreamInformation, FilePipeInformation, FilePipeLocalInformation, FilePipeRemoteInformation, FileMailslotQueryInformation, FileMailslotSetInformation, FileCompressionInformation, FileObjectIdInformation, FileCompletionInformation, FileMoveClusterInformation, FileQuotaInformation, FileReparsePointInformation, FileNetworkOpenInformation, FileAttributeTagInformation, FileTrackingInformation, FileIdBothDirectoryInformation, FileIdFullDirectoryInformation, FileValidDataLengthInformation, FileShortNameInformation, FileIoCompletionNotificationInformation, FileIoStatusBlockRangeInformation, FileIoPriorityHintInformation, FileSfioReserveInformation, FileSfioVolumeInformation, FileHardLinkInformation, FileProcessIdsUsingFileInformation, FileNormalizedNameInformation, FileNetworkPhysicalNameInformation, FileIdGlobalTxDirectoryInformation, FileIsRemoteDeviceInformation, FileAttributeCacheInformation, FileNumaNodeInformation, FileStandardLinkInformation, FileRemoteProtocolInformation, FileMaximumInformation ); PIOStatusBlock = ^TIOStatusBlock; TIOStatusBlock = packed record case Boolean of False: (Status: NTSTATUS; P: Pointer;); True: (Information: ULONG_PTR); end; PFileStreamInformation = ^TFileStreamInformation; TFileStreamInformation = packed record NextEntryOffset: ULONG; StreamNameLength: ULONG; StreamSize: LARGE_INTEGER; StreamAllocationSize: LARGE_INTEGER; StreamName: array[0..0] of Char; end; type TNtQueryInformationFile = function(FileHandle: THandle; IoStatusBlock: PIOStatusBlock; FileInformation: Pointer; Length: ULONG; FileInformationClass: TFileInformationClass): NTSTATUS; stdcall; procedure GetAlternateFileStreamNames(const FileName: string; StreamNames: TStrings); var hNT, hFile: THandle; NtQueryInformationFile: TNtQueryInformationFile; Buffer: array[Word] of Byte; ioStatus: TIOStatusBlock; P: PFileStreamInformation; S: string; L: Integer; begin hNT := GetModuleHandle('ntdll.dll'); if hNT = 0 then Exit; NtQueryInformationFile := GetProcAddress(hNT, 'NtQueryInformationFile'); if @NtQueryInformationFile = nil then Exit; FillChar(Buffer, SizeOf(Buffer), 0); hFile := CreateFile(PChar(FileName), 0, FILE_SHARE_READ or FILE_SHARE_WRITE, nil, OPEN_EXISTING, 0, 0); try if NtQueryInformationFile(hFile, @ioStatus, @Buffer[0], SizeOf(Buffer), FileStreamInformation) = 0 then begin StreamNames.BeginUpdate; try StreamNames.Clear; P := @Buffer[0]; while Assigned(P) do begin SetString(S, P^.StreamName, P^.StreamNameLength div SizeOf(Char)); // strip trailing :$DATA L := Length(S); if (L &gt;= 6) and (StrComp(@S[L - 5], ':$DATA') = 0) then Delete(S, L - 5, L); StreamNames.Add(S); if P^.NextEntryOffset = 0 then P := nil else P := Pointer(Integer(P) + P^.NextEntryOffset); //@Buffer[P^.NextEntryOffset]; end; finally StreamNames.EndUpdate; end; end; finally CloseHandle(hFile); end; end; procedure TForm1.Button2Click(Sender: TObject); var StreamNames: TStringList; begin StreamNames := TStringList.Create; try GetAlternateFileStreamNames('C:\Temp\123', StreamNames); ShowMessage(StreamNames.Text); finally StreamNames.Free; end; end; </code></pre> <p>For the file created by your code as posted in your question, it shows the following entries:</p> <ol> <li><code>':'</code> - unnamed main stream, I think</li> <li><code>':123.txt'</code> - the first alternate stream</li> <li><code>':345.txt'</code> - the second alternate stream</li> </ol> <p>Totally untested and weird, also it needs to be modified for D2007 and earlier.</p>
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