Mapscript: how do I zoom to query result???

[Mark de Blois]

Hi all,

I have just started working with MapScript which seems to be great! I have
successfully been able to generate a query and have the result show up.
What I need to do now is change the extent to that of my selection before
drawing the map. Shouldn't be too difficult I'd imagine but I have not
idea where to start.
Can anyone give me a hint or point me to an example in which this is
already done?

cheers,
Mark