  
Hi Helpers.
I am creating one wrapper VC++ dll for use some simple statistical functions like correlation/covariance for my college project.
I have done the following:    

I have gone thru R-exts.pdf u r mentioning. I have follwed the steps gievn under topic "The R api: entry points for C code". 
I have done these things
1) Created vc++ simple dll project.
2)inclued <R.h> in the .cpp file.
3) added path <R_HOME>\src\include, <R_HOME>\src\R_ext\include  in the user settiing include & path in advanced system settings
4) added R.dll in the project path. I dont have R.lib
5) from some wrapper function calling int i = do_seq(1, 1, 1, 1); function (do_seq is in export symbols in R.dll). 
Now it is not recoginising.
So , guide me in first l how to use  SEXP varaible, and make me run 1 functionality .pls Reply ASAP. 
* I will appreciate if I can chat with the person who has soln for my problem for 10-15 min to help me live.Pls contact me on rnassa123@yahoo.com 
rnassa@hotmail.com
 
Rakesh Nassa 
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