how to change the group box's text(caption) color?

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MFC

Hi, guys.
How to change the text(caption) color of group box in dialog of MFC?

I use VS2008, and default caption color of group box is blue.
I want to change blue color to black color.
The following is my code. But there is no effect.

HBRUSH CTempDetDlg::OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor)
{

  HBRUSH hbr = CDialog::OnCtlColor(pDC, pWnd, nCtlColor);
  // TODO: Change any attributes of the DC here
  if(pWnd->GetDlgCtrlID()==IDC_STA1) //group box's id
  {
    pDC->SetBkColor(BLACK);
    pDC->SetTextColor(RED);
    pDC->SetBkMode(TRANSPARENT);
    hbr = (HBRUSH)m_brush;
  }
  return hbr;
}
CBrush m_brush;
m_brush.CreateSolidBrush(BLACK);

Help me, pls.
Thanks.