+The style will be set to wxSTIPPLE, unless the bitmap has a mask associated
+to it, in which case the style will be set to wxSTIPPLE_MASK_OPAQUE.
+
+If the wxSTIPPLE variant is used, the bitmap will be used to fill out the
+area to be drawn. If the wxSTIPPLE_MASK_OPAQUE is used, the current
+text foreground and text background determine what colours are used for
+displaying and the bits in the mask (which is a mono-bitmap actually)
+determine where to draw what.