-Returns the background style of the window. The background style indicates
-whether background colour should be determined by the system (wxBG\_STYLE\_SYSTEM),
-be set to a specific colour (wxBG\_STYLE\_COLOUR), or should be left to the
-application to implement (wxBG\_STYLE\_CUSTOM).
-
-On GTK+, use of wxBG\_STYLE\_CUSTOM allows the flicker-free drawing of a custom
-background, such as a tiled bitmap. Currently the style has no effect on other platforms.
+Returns the background style of the window. The background style can be one of:
+\begin{twocollist}\itemsep=0pt
+\twocolitem{wxBG\_STYLE\_SYSTEM}{Use the default background, as determined by
+the system or the current theme.}
+\twocolitem{wxBG\_STYLE\_COLOUR}{Use a solid colour for the background, this
+style is set automatically if you call
+\helpref{SetBackgroundColour}{wxwindowsetbackgroundcolour} so you only need to
+set it explicitly if you had changed the background style to something else
+before.}
+\twocolitem{wxBG\_STYLE\_CUSTOM}{Don't draw the background at all, it's
+supposed that it is drawn by the user-defined erase background event handler.
+This style should be used to avoid flicker when the background is entirely
+custom-drawn.}
+\twocolitem{wxBG\_STYLE\_TRANSPARET}{The background is (partially) transparent,
+this style is automatically set if you call
+\helpref{SetTransparent}{wxwindowsettransparent} which is used to set the
+transparency level.}
+\end{twocollist}