Problems saving audio files

I'm writing a sound recording application in borland. It is a form with 4 buttons. record, play stop and save. Unfortunately while the program records the sound correctly it does not save it in the required format. The program saves the file with a filename looking like this 整瑳䌀尺整瑳眮癡匀癡⁥牅潲r instead of the filename.wav if the filename is given a .wav extension then it plays the sound correctly however this is not suitable for the application.
Any help on why this happens would be gratefully received.

Code:

---

//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
  : TForm(Owner)
{
  m_hMCIWnd = NULL;

  /* create window needed for sound recording */
  m_hMCIWnd = MCIWndCreate(Handle, g_hInstance, WS_CHILD | WS_OVERLAPPED, NULL);

  if(m_hMCIWnd == NULL)    // check window was created correctly
  {
    MessageBox(Handle, "Error Creating Sound Record Window", NULL, MB_OK);
    return;
  }
}
//---------------------------------------------------------------------------

void __fastcall TForm1::btnRecordClick(TObject *Sender)
{
  // create new .WAV file
  if(MCIWndNew(m_hMCIWnd, "waveaudio") != 0)
  {
    MessageBox(Handle, "Error Starting Record", NULL, MB_OK);
  }

  // begin recording
  MCIWndSeek(m_hMCIWnd, MCIWND_START);
  MCIWndRecord(m_hMCIWnd);

  /* disable buttons */
  btnRecord->Enabled = false;
  btnPlay->Enabled = false;
  btnStop->Enabled = true;
  btnSave->Enabled = false;
}
//---------------------------------------------------------------------------

void __fastcall TForm1::FormDestroy(TObject *Sender)
{
  MCIWndClose(m_hMCIWnd);
  MCIWndDestroy(m_hMCIWnd);    // close mci now finished with
}

//---------------------------------------------------------------------------
void __fastcall TForm1::btnStopClick(TObject *Sender)
{
  // stop recording and save file
  MCIWndStop(m_hMCIWnd);

  /* enable buttons */
  btnRecord->Enabled = true;
  btnPlay->Enabled = true;
  btnStop->Enabled = false;
  btnSave->Enabled = true;
}
//---------------------------------------------------------------------------
void __fastcall TForm1::btnPlayClick(TObject *Sender)
{
  MCIWndSeek(m_hMCIWnd, MCIWND_START);    // seek back to the start to play the sound
  MCIWndPlay(m_hMCIWnd);
}
//---------------------------------------------------------------------------
void __fastcall TForm1::btnSaveClick(TObject *Sender)
{
  /* save the file */
  if(edtFileName->Text == "")
  {
    ShowMessage("Please enter the word to save");    // check somewhere to save to 
  }
  else
  {
    MCIWndSave(m_hMCIWnd, "test");

    if(MCIWndSave(m_hMCIWnd, "C:\\test.wav") != 0)
    {
      ShowMessage("Save Error");
    }
  }
}
//---------------------------------------------------------------------------

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