How to use a R package with C code

Hello, everybody,

I created a R package which includes C code. But I load this package, and carry
out the R function in it. It shows C function is not in load table as follows.
Would you tell me what is the problem? Where do I make mistake?

Maggie



[Previously saved workspace restored]

library(var)

Attaching package 'var':


        The following object(s) are masked _by_ .GlobalEnv :

         b

wxt0124()

Error in .C("wxt1221") : C function name not in load table