Not sure if I get you right, but normally you don't need an add-on. Just set up your c compiler to work with PSPad. (You can find lots of free compilers at http://compilers.net/.) Search the help file that comes with PSPad for "compiler".
-- <http://forum.pspad.com/read.php?2,35684,35694> PSPad freeware editor http://www.pspad.com
