How to use http://www.example.com?a=1&b=2&c=3 variables

Hi

I'd like to now how I can pass variables like this... I have a site that had pages called like this, but with drupal, it doesn't work.

Say I want c=1 to be passed on to a specific static page with PHP code in it (so that the PHP code can use 'c'); I'd normally use http://www.example.com/?q=node/2&c=1.

This doesn't work however...

Who has the solution?

Tia

Bas