Im not newbie in programming, just trying to learn more every day with my experiments.
I need to create one specific file, like described in documenttation of file format. But my problem is how to write many records in file? Look my code.
Code:
type
   tmy_file_header=record
      file_type:array[0..3] of Char;
      vers_code:Word;
end;

mfh: tmy_file_header;
f: file of tmy_file_header;

procedure TForm1.Button1Click(Sender: TObject);
begin
   assignfile(f,'c:\data.dat');
   {$I-}
      reset(f);
      seek(f, filesize(f));
   {$I+}
   if ioresult=0 then
   begin
      // write
      mfh.file_type:='MHDR';
      mfh.vers_code:=100;
      write(f,mfh);
   end
   else
      begin
         {$I-}
            rewrite(f);
         {$I+}
         if ioresult=0 then
         begin
            // write
            mfh.file_type:='MHDR';
            mfh.vers_code:=100;
            write(f,mfh);
         end
         else
            showmessage('Unable to create file!');
      end;
end;
tmy_file_header is my first record, but i must to create more records and write them all to one file, without removing/corrupting previous data from/in file.

If i write another:
Code:
f: file of other_record;
then Delphi displays error: "Incompatible types: first record and other record"

Creating every time new F type is not good way.
How to solve this problem? Any ideas?

btw: i just started learning using delphi "record and type".