procedure TCommThread.Execute;
var
  Handles: Array[0..3] Of THandle;
  dummy: DWord;
begin
  Handles[0] := hTerminateEvent;
  Handles[1] := iOverlapped.hEvent;
  Handles[2] := hClosePortEvent;
  Handles[3] := hOpenPortEvent;
  repeat
    WaitCommEvent(FCommHandle, FEvtMask, @iOverlapped); // Init Wait (returnes immediately, because of overlapped event)
    Case WaitForMultipleObjects(4, @Handles, FALSE, INFINITE) Of // Wait for an event to occur
      WAIT_OBJECT_0+0: Begin
                         Terminate;
                         Break;
                       End;
      // Zeichen empfangen
      WAIT_OBJECT_0+1: Begin
                         If GetOverlappedResult(FCommHandle, iOverlapped, dummy, FALSE) Then Begin
                           If ClearCommError(FCommHandle, fErrorMask, @fCT) Then Begin
                             If (fEvtMask=EV_RXCHAR) And (fCT.cbInQue=0) Then Continue; // restart loop!!

                             If Assigned(FOnThreadEvent) Then Synchronize(DoOnThreadEvent);
                           End
                           Else GetLastError; // returns 6 (INVALID_HANDLE)
                         End
                         Else Begin
                           dummy := GetLastError; // reset error
                           ResetEvent(iOverlapped.hEvent); // new 30.6.2003 (reset false event)
                         End;
                       End;

      // Schnittstelle schließen
      WAIT_OBJECT_0+2:
      Begin
        CloseHandle(fCommHandle);
        fCommHandle := INVALID_HANDLE_VALUE;
        ResetEvent(hClosePortEvent);
      End;

      // Schnittstelle öffnen
      WAIT_OBJECT_0+3:
      Begin
        InitializePort;
        ResetEvent(hOpenPortEvent);
      End;


      else Begin
        // Should never happen (DON'T EXIT)
      End;
    End;
  until Terminated;

  CloseHandle(FCommHandle);
  fCommHandle := INVALID_HANDLE_VALUE;

  CloseHandle(iOverlapped.hEvent);
  CloseHandle(hTerminateEvent);
  CloseHandle(hClosePortEvent);
  CloseHandle(hOpenPortEvent);
end;