I´m quite that I read, that lite-c is ANSI C Standart. Wich means that you can do it on the same way as in C.
If you don´t know how to do it, have a look at this post:
http://www.coniserver.net/ubbthreads/showflat.php/Cat/0/Number/776307/an/0/page/0#Post776307

Lite-C Tut. 1 Lite-C Tut. 2 Lite-C Tut. 3 (en)
Shader Tutorial (ger)

http://www.slindev.com