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procedure TData.LoadFromFile;
var
  iFileHandle : Integer;
  iFileLength : Integer;
  iBytesRead  : Integer;
  Buffer      : PChar;
  i           : Integer;
  sTimeStamp  : string;
begin
  if FU_ASTM_Sender.FrmASTM_Sender.OpenDialog1.Execute then
  begin
    try
      iFileHandle := SysUtils.FileOpen(FU_ASTM_Sender.FrmASTM_Sender.OpenDialog1.FileName, fmOpenRead);
      iFileLength := SysUtils.FileSeek(iFileHandle,0,2);
      FileSeek(iFileHandle,0,0);
      Buffer := PChar(System.AllocMem(iFileLength + 1));
      iBytesRead := SysUtils.FileRead(iFileHandle, Buffer^, iFileLength);
      sTimeStamp := FormatDateTime('YYYYMMDDHHNNSS',now);
      FU_ASTM_Sender.FrmASTM_Sender.ASTM.lines.Clear;
      FileClose(iFileHandle);
      for i := 0 to iBytesRead-1 do
      begin
      if i = 0 then
        FU_ASTM_Sender.FrmASTM_Sender.ASTM.lines.Add(StringReplace(Buffer[i],'#TS#',sTimeStamp,[rfIgnoreCase]))
      else
        FU_ASTM_Sender.FrmASTM_Sender.ASTM.lines.Add(Buffer[i]);
  end;
    finally
      FreeMem(Buffer);
    end;
  end;
end;