wxStyledTextCtrl highlighting line question

Suppose I have a file displayed in a wxStyledTextCtrl. How can I go
about to highlight (say, by setting a different background colour) a
given line of text programmetically.

To put it differently, I imagine doing something the following (invented syntax)

···

===
line = text.SelectLine(42)
line.SetBackground("yellow")

I have read the documentation on
http://wiki.wxpython.org/index.cgi/wxStyledTextCtrl

but haven't been able to identify something helpful. (tiredness perhaps?)

Any help would be appreciated.

André