func doDraw(Data)
  fvar(b,obj)
  b = Bitmap
  switch(DrawSource)
    case 0:
      obj = b + '.'
      b = ''
    case 1:
      obj = ''
      lng.decl_loc_var(dc, 'HDC') 
      println(dc, ' := GetDC(', e_int(b), ');')
      b = dc && ', '
    case 2:
      obj = ''
      b = e_int(b) && ', '
  end
  println(obj, 'SetPixel(', b, X, ', ', Y, ', ', Color, ');')
  event(onDraw, _data_)
end