That is, do not limit to VB / Foxpro but introduce your creative idea behind it in your project, for instance, algorithm and software architecture. Introduce your good personality, such as leadership, motivation in your statement of purpose and your self-introduction to professor.
Just let them know you have something special
which others do not have.

The first sentence in my letter of acceptance from
Univ. of Waterloo is:

In evaluating your application, our admission commitee and I are very impressed by your excellent record and POTENTIAL for research.

If your record is not so strong, show them your
aggressiveness and potential.

For GRE, if it does not waster you too much time,
you might take. If you have no time to do it, just show the expired one as a reference to the professor. GRE, although not a must, shows your ability as well as your seriousness to continue
to study.