A template for <programlisting>

Some weeks ago I think I saw
a message showing a customization template for <programlisting/>
that provides a kind of rectangular coloured block as a background for this
element. I’ve been browsing the archives but I couldn’t find it. 

 

If this is not a produce of
my imagination: Could anybody provide me that information? Or, maybe, if there
is somebody not bothering sharing this code (just for HTML would be OK).

 

Regards,

 

Pedro

 

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