R help - Jul 2007 - Interface R and C - windows

Hello,

I want use the interface between R and C.  I usually work in windows.

I installed the Rtools.exe and ActivePerl 5.8.8 in the path  C:\R\R-2.3.1 like
it is in the Appendix F the windows tools (Manual).  However, I do not have
sucess. How should I do this ? Which type of path should I use?
 
Other question is about how compiling C code using the Dev-C++ and librarys of
packages R. For example, I want use the function dnorm and I include in compiler
options the library Rmath.h and dnorm.c:
 
#include <stdio.h> 
#include <Rmath.h>
#include <dnorm.c>

        main()
        {
           int a, b, s;
 
           printf("Introduza um n?mero:\n");
           scanf("%d", &a);
           printf("Introduza outro n?mero:\n");
           scanf("%d", &b);
           s = a + b;
           s=dnorm(2,1,1,1);
           printf("A densidade de %d com %d d? %d\n", a, b, s);
           system("PAUSE");
        }

 
However, this code do not work. 


 thanks

the best regard

 Elisabete Fernandes