How do u crochet around a material apron?

ask here:

http://www.allexperts.com/el/Crochet/

First you have to take a steel crochet hook and poke holes in the material where you want to crochet, then you take your yarn and start with a single crochet all the way around.  Then just complete whatever pattern of stitches you are going to use.  This is the same method for crocheting on the tops of towels. 

I hope this is helpful.

It is much easier to use a small blanket stitch with a sewing needle & crochet thread around the edge to be crocheted.  Then crochet in the free loop of the blanket stitch.  Result: no struggle trying to get hook through material; no large holes; one happy camper (crocheter).