Hi, I'm just learning to write R extensions in C and to embed R in C. I was trying to get through the example in the help page on calling the .dll directly ( http://cran.r-project.org/doc/manuals/R-exts.html#Calling-R_002edll-directly ). When I compile I consistently get the error that getDLLVersion() as well as get_R_HOME() and getRUser() are not defined (this might not be verbatim the error that I get, I'm compiling on a computer at work and posting this at home). These are defined in Rembedded.h ln60 as: extern char *getDLLVersion(void), *getRUser(void), *get_R_HOME(void); I included Rembedded.h from the example. I searched the entire R directory for the string getDLLVersion and only found it in Rembedded.h and the help documentation (for the .dll directly example). Am I missing some key file or just not understanding how these functions work? I'm just learning C so this may be a very basic question. If anyone could point me to a good reference on this it would be very helpful. Technical Notes: OS: win7 32bit Compiler: mingw32 R: 2.11.1 Thanks Kyle [[alternative HTML version deleted]]