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function WinExecAndWait_32(FileName: string; Visibility: Integer; bWait: Boolean = False): Longword;
var { by Pat Ritchey }
  zAppName: array[0..512] of Char;
  zCurDir: array[0..255] of Char;
  WorkDir: string;
  StartupInfo: TStartupInfo;
  ProcessInfo: TProcessInformation;
begin
  StrPCopy(zAppName, FileName);
  GetDir(0, WorkDir);
  StrPCopy(zCurDir, WorkDir);
  FillChar(StartupInfo, SizeOf(StartupInfo), #0);
  StartupInfo.cb := SizeOf(StartupInfo);
  StartupInfo.dwFlags := STARTF_USESHOWWINDOW;
  StartupInfo.wShowWindow := Visibility;
  if not CreateProcess(nil,
    zAppName, // pointer to command line string
    nil, // pointer to process security attributes
    nil, // pointer to thread security attributes
    False, // handle inheritance flag
    CREATE_NEW_CONSOLE or // creation flags
    NORMAL_PRIORITY_CLASS,
    nil, //pointer to new environment block
    nil, // pointer to current directory name
    StartupInfo, // pointer to STARTUPINFO
    ProcessInfo) // pointer to PROCESS_INF
    then Result := WAIT_FAILED
  else
  begin
    if bWait then
      WaitForSingleObject(ProcessInfo.hProcess, INFINITE);
    GetExitCodeProcess(ProcessInfo.hProcess, Result);
    CloseHandle(ProcessInfo.hProcess);
    CloseHandle(ProcessInfo.hThread);
  end;
end; { WinExecAndWait32 }                    

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if ShellExecute(Application.Handle,
                 'open',
                 PChar({Dateipfad+Name}),
                 Nil, Nil, SW_NORMAL) <= 32 then
    ShowMessage('Es ist ein Fehler aufgetreten');