Transparent text using CTextView

Hello

  Please, don't you know how to draw text transparently using CTextView or CTextLayout? I need to draw this text on a bitmap but the CTextView always draws also white backgound.
  I also tried to set null brush (CWindowGc::SetBrushType()) but it did not help.

  Other possibility could be to draw text on some auxiliary bitmap, create mask and draw this bitmap transparently but i believe that there is a simpler solution (anyway .. i you know how to draw text on my own bitmap, it would be also helpful).

Thank you