Review some of the Microchip DC motor control application notes here:
http://www.microchip.com/stellent/id...1505&pageId=64

Decide on the components you plan to use, put together a schematic, then
take a shot at putting together your code to make it work.

If you have problems with a particular code segment, motor drive circuit, etc,
then post what you have done so far here.

People here are more than willing to offer assistance, but most prefer to see
that you have made an effort to solve the problem yourself first.

There are several threads on this forum as well on DC motor control. Use the
search button for DC Motor Control.