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procedure RunExtApp(DosApp:String);
 const
    ReadBuffer = 2400;
 var
  Security            : TSecurityAttributes;
  ReadPipe,WritePipe  : THandle;
  start               : TStartUpInfo;
  ProcessInfo         : TProcessInformation;
  Buffer              : Pchar;
  BytesRead           : DWord;
  Apprunning          : DWord;
 begin
  With Security do begin
   nlength              := SizeOf(TSecurityAttributes);
   binherithandle       := true;
   lpsecuritydescriptor := nil;
  end;
  if Createpipe (ReadPipe, WritePipe, @Security, 0) then
  begin
   Buffer  := AllocMem(ReadBuffer + 1);
   FillChar(Start,Sizeof(Start),#0);
   start.cb          := SizeOf(start);
   start.hStdOutput  := WritePipe;
   start.hStdInput   := ReadPipe;
   start.dwFlags     := STARTF_USESTDHANDLES + STARTF_USESHOWWINDOW;
   start.wShowWindow := SW_HIDE;

   if CreateProcess(nil, PChar(DosApp), @Security, @Security,
          true, NORMAL_PRIORITY_CLASS, nil, nil,  start, ProcessInfo)
   then
   begin
    repeat
     Apprunning := WaitForSingleObject(ProcessInfo.hProcess,100);
    until (Apprunning <> WAIT_TIMEOUT);
     Repeat
       BytesRead := 0;
       ReadFile(ReadPipe,Buffer[0], ReadBuffer,BytesRead,nil);
       Buffer[BytesRead]:= #0;
       OemToAnsi(Buffer,Buffer);
       Writeln(String(Buffer)); 
//hier wird der output in mein fenster geschrieben
     until (BytesRead < ReadBuffer);
  end;
  FreeMem(Buffer);
  CloseHandle(ProcessInfo.hProcess);
  CloseHandle(ProcessInfo.hThread);
  CloseHandle(ReadPipe);
  CloseHandle(WritePipe);
  end;
 end;