{ You'll need a OpenDialog to open a Exe-File and a Memo to show the file informations }

{

  Man braucht einen OpenDialog um eine Exe-Datei zu öffnen und ein Memo,

  um die Informationen anzuzeigen.

}

procedure DumpDOSHeader(const h: IMAGE_DOS_HEADER; Lines: TStrings);

begin

  Lines.Add('Dump of DOS file header');

  Lines.Add(Format('Magic number: %d', [h.e_magic]));

  Lines.Add(Format('Bytes on last page of file: %d', [h.e_cblp]));

  Lines.Add(Format('Pages in file: %d', [h.e_cp]));

  Lines.Add(Format('Relocations: %d', [h.e_crlc]));

  Lines.Add(Format('Size of header in paragraphs: %d', [h.e_cparhdr]));

  Lines.Add(Format('Minimum extra paragraphs needed: %d', [h.e_minalloc]));

  Lines.Add(Format('Maximum extra paragraphs needed: %d', [h.e_maxalloc]));

  Lines.Add(Format('Initial (relative) SS value: %d', [h.e_ss]));

  Lines.Add(Format('Initial SP value: %d', [h.e_sp]));

  Lines.Add(Format('Checksum: %d', [h.e_csum]));

  Lines.Add(Format('Initial IP value: %d', [h.e_ip]));

  Lines.Add(Format('Initial (relative) CS value: %d', [h.e_cs]));

  Lines.Add(Format('File address of relocation table: %d', [h.e_lfarlc]));

  Lines.Add(Format('Overlay number: %d', [h.e_ovno]));

  Lines.Add(Format('OEM identifier (for e_oeminfo): %d', [h.e_oemid]));

  Lines.Add(Format('OEM information; e_oemid specific: %d', [h.e_oeminfo]));

  Lines.Add(Format('File address of new exe header: %d', [h._lfanew]));

  Lines.Add('');

end;

procedure DumpPEHeader(const h: IMAGE_FILE_HEADER; Lines: TStrings);

var

  dt: TDateTime;

begin

  Lines.Add('Dump of PE file header');

  Lines.Add(Format('Machine: %4x', [h.Machine]));

  case h.Machine of

    IMAGE_FILE_MACHINE_UNKNOWN : Lines.Add(' MACHINE_UNKNOWN ');

    IMAGE_FILE_MACHINE_I386: Lines.Add(' Intel 386. ');

    IMAGE_FILE_MACHINE_R3000: Lines.Add(' MIPS little-endian, 0x160 big-endian ');

    IMAGE_FILE_MACHINE_R4000: Lines.Add(' MIPS little-endian ');

    IMAGE_FILE_MACHINE_R10000: Lines.Add(' MIPS little-endian ');

    IMAGE_FILE_MACHINE_ALPHA: Lines.Add(' Alpha_AXP ');

    IMAGE_FILE_MACHINE_POWERPC: Lines.Add(' IBM PowerPC Little-Endian ');

    // some values no longer defined in winnt.h

    $14D: Lines.Add(' Intel i860');

    $: Lines.Add(' Motorola 68000');

    $: Lines.Add(' PA RISC');

    else

      Lines.Add(' unknown machine type');

  end; { Case }

  Lines.Add(Format('NumberOfSections: %d', [h.NumberOfSections]));

  Lines.Add(Format('TimeDateStamp: %d', [h.TimeDateStamp]));

  dt := EncodeDate(, , ) + h.Timedatestamp / SecsPerDay;

  Lines.Add(FormatDateTime(' c', dt));

  Lines.Add(Format('PointerToSymbolTable: %d', [h.PointerToSymbolTable]));

  Lines.Add(Format('NumberOfSymbols: %d', [h.NumberOfSymbols]));

  Lines.Add(Format('SizeOfOptionalHeader: %d', [h.SizeOfOptionalHeader]));

  Lines.Add(Format('Characteristics: %d', [h.Characteristics]));

  if (IMAGE_FILE_DLL and h.Characteristics) <>  then

    Lines.Add(' file is a DLL')

  else if (IMAGE_FILE_EXECUTABLE_IMAGE and h.Characteristics) <>  then

    Lines.Add(' file is a program');

  Lines.Add('');

end;

procedure DumpOptionalHeader(const h: IMAGE_OPTIONAL_HEADER; Lines: TStrings);

begin

  Lines.Add('Dump of PE optional file header');

  Lines.Add(Format('Magic: %d', [h.Magic]));

  case h.Magic of

    $: Lines.Add(' ROM image');

    $10b: Lines.Add(' executable image');

    else

      Lines.Add(' unknown image type');

  end; { If }

  Lines.Add(Format('MajorLinkerVersion: %d', [h.MajorLinkerVersion]));

  Lines.Add(Format('MinorLinkerVersion: %d', [h.MinorLinkerVersion]));

  Lines.Add(Format('SizeOfCode: %d', [h.SizeOfCode]));

  Lines.Add(Format('SizeOfInitializedData: %d', [h.SizeOfInitializedData]));

  Lines.Add(Format('SizeOfUninitializedData: %d', [h.SizeOfUninitializedData]));

  Lines.Add(Format('AddressOfEntryPoint: %d', [h.AddressOfEntryPoint]));

  Lines.Add(Format('BaseOfCode: %d', [h.BaseOfCode]));

  Lines.Add(Format('BaseOfData: %d', [h.BaseOfData]));

  Lines.Add(Format('ImageBase: %d', [h.ImageBase]));

  Lines.Add(Format('SectionAlignment: %d', [h.SectionAlignment]));

  Lines.Add(Format('FileAlignment: %d', [h.FileAlignment]));

  Lines.Add(Format('MajorOperatingSystemVersion: %d', [h.MajorOperatingSystemVersion]));

  Lines.Add(Format('MinorOperatingSystemVersion: %d', [h.MinorOperatingSystemVersion]));

  Lines.Add(Format('MajorImageVersion: %d', [h.MajorImageVersion]));

  Lines.Add(Format('MinorImageVersion: %d', [h.MinorImageVersion]));

  Lines.Add(Format('MajorSubsystemVersion: %d', [h.MajorSubsystemVersion]));

  Lines.Add(Format('MinorSubsystemVersion: %d', [h.MinorSubsystemVersion]));

  Lines.Add(Format('Win32VersionValue: %d', [h.Win32VersionValue]));

  Lines.Add(Format('SizeOfImage: %d', [h.SizeOfImage]));

  Lines.Add(Format('SizeOfHeaders: %d', [h.SizeOfHeaders]));

  Lines.Add(Format('CheckSum: %d', [h.CheckSum]));

  Lines.Add(Format('Subsystem: %d', [h.Subsystem]));

  case h.Subsystem of

    IMAGE_SUBSYSTEM_NATIVE:

      Lines.Add(' Image doesn''t require a subsystem. ');

    IMAGE_SUBSYSTEM_WINDOWS_GUI:

      Lines.Add(' Image runs in the Windows GUI subsystem. ');

    IMAGE_SUBSYSTEM_WINDOWS_CUI:

      Lines.Add(' Image runs in the Windows character subsystem. ');

    IMAGE_SUBSYSTEM_OS2_CUI:

      Lines.Add(' image runs in the OS/2 character subsystem. ');

    IMAGE_SUBSYSTEM_POSIX_CUI:

      Lines.Add(' image run in the Posix character subsystem. ');

    else

      Lines.Add(' unknown subsystem')

  end; { Case }

  Lines.Add(Format('DllCharacteristics: %d', [h.DllCharacteristics]));

  Lines.Add(Format('SizeOfStackReserve: %d', [h.SizeOfStackReserve]));

  Lines.Add(Format('SizeOfStackCommit: %d', [h.SizeOfStackCommit]));

  Lines.Add(Format('SizeOfHeapReserve: %d', [h.SizeOfHeapReserve]));

  Lines.Add(Format('SizeOfHeapCommit: %d', [h.SizeOfHeapCommit]));

  Lines.Add(Format('LoaderFlags: %d', [h.LoaderFlags]));

  Lines.Add(Format('NumberOfRvaAndSizes: %d', [h.NumberOfRvaAndSizes]));

end;

// Example Call, Beispielaufruf:

procedure TForm1.Button1Click(Sender: TObject);

var

  fs: TFilestream;

  signature: DWORD;

  dos_header: IMAGE_DOS_HEADER;

  pe_header: IMAGE_FILE_HEADER;

  opt_header: IMAGE_OPTIONAL_HEADER;

begin

  memo1.Clear;

  with Opendialog1 do

  begin

    Filter := 'Executables (*.EXE)|*.EXE';

    if Execute then

    begin

      fs := TFilestream.Create(FileName, fmOpenread or fmShareDenyNone);

      try

        fs.read(dos_header, SizeOf(dos_header));

        if dos_header.e_magic <> IMAGE_DOS_SIGNATURE then

        begin

          memo1.Lines.Add('Invalid DOS file header');

          Exit;

        end;

        DumpDOSHeader(dos_header, memo1.Lines);

        fs.seek(dos_header._lfanew, soFromBeginning);

        fs.read(signature, SizeOf(signature));

        if signature <> IMAGE_NT_SIGNATURE then

        begin

          memo1.Lines.Add('Invalid PE header');

          Exit;

        end;

        fs.read(pe_header, SizeOf(pe_header));

        DumpPEHeader(pe_header, memo1.Lines);

        if pe_header.SizeOfOptionalHeader >  then

        begin

          fs.read(opt_header, SizeOf(opt_header));

          DumpOptionalHeader(opt_header, memo1.Lines);

        end;

      finally

        fs.Free;

      end; { finally }

    end;

  end;

end;