I think you need understand first that WED is a level editor and lite-c is a scripting language. So you cant "use WED with lite-c".

If you want program a game in lite-c you must first make a simple script like:

#include <acknex.h>

function main()
{
level_load("mylevel.wmb");
}

and then you can use WED to attach that script to your level, in Map Properties. Then you can use WED RUN to run that script. Hope this helps.

Its all in the tutorial.