Get File version info.

This piece of code should work

const
  InfoNum = 10;
  InfoStr: array[1..InfoNum] of string = ('CompanyName',
  'FileDescription', 'FileVersion', 'InternalName', 'LegalCopyright',
  'LegalTradeMarks', 'OriginalFileName', 'ProductName', 'ProductVersion', 'Comments');

function GetFileVersionString(AFileName: string): string;
var
  VerStr: string;
  n, Len: DWORD;
  Buf: PChar;
  Value: PChar;
begin
  n := GetFileVersionInfoSize(PChar(AFileName), n);
  if n > 0 then
  begin
    Buf := AllocMem(n);
    try
      GetFileVersionInfo(PChar(AFileName), 0, n, Buf);
      if VerQueryValue(Buf, PChar('\StringFileInfo\040B04E4\FileVersion'), Pointer(Value), Len) then
        VerStr := 'Version: ' + Value
      else
        VerStr := 'Unknown version ';
    finally
      FreeMem(Buf);
    end;
  end
  else
    VerStr := 'No version information available';
  Result := VerStr;
end;

Hi jpedef, thanks.

There is a problem with the code...
It shows 'no version info available' for files that have a version string.

I use it like this :
GetFileVersionString(Path of exe + exefilename)

How can i get the other strings like "comments","FileDescription","Company" etc ?

Try this one:
function getVersion : string;                         // poached from the online documentation
const    NOVIDATA = '';
var
  dwInfoSize,           // Size of VERSIONINFO structure
  dwVerSize,            // Size of Version Info Data
  dwWnd: DWORD;         // Handle for the size call.
  FI: PVSFixedFileInfo; // Delphi structure; see WINDOWS.PAS
  ptrVerBuf: Pointer;   // pointer to a version buffer
  strFileName,          // Name of the file to check
  strVersion : string;  // Holds parsed version number
begin
   strFileName := paramStr( 0 );
   dwInfoSize := getFileVersionInfoSize( pChar( strFileName ), dwWnd);
   if ( dwInfoSize = 0 ) then
      result := NOVIDATA
   else
     begin
       getMem( ptrVerBuf, dwInfoSize );
       try
         if getFileVersionInfo(pChar(strFileName),dwWnd,dwInfoSize,ptrVerBuf) and verQueryValue(ptrVerBuf,'\',pointer(FI),dwVerSize) then
           strVersion := format('%d.%d.%d.%d',[hiWord(FI.dwFileVersionMS),loWord(FI.dwFileVersionMS),
                       hiWord(FI.dwFileVersionLS),loWord(FI.dwFileVersionLS)]);
       finally
         freeMem( ptrVerBuf );
       end;
     end;
  Result := strVersion;
end;

Thanks Russell :)

No problem

Russell