Hi, I have successfully compiled DLLs and invoked the functions using the R toolset. I would also like to compile the DLL using Microsof Visual Studio compiler (2005, if that matters). The FAQ tells how to do that from the command line; however I'd also like to do that from within the IDE. So far I failed: The DLL was built, and actually the function of interest was put under export category; but apparently something did not work out because R couldn't locate the function (loading the DLL worked fine). I know this question is only marginally R related, so : a) is it simple to set up a virgin (empty) project using the MSVC IDE? Any hints would be much appreciated. b) otherwise, shall I transfer the question to a MSVC newsgroup and ask for helping translating the command-line options into the project settings I have to set in the IDE ? Is there a 1:1 mapping ? Thanks, Thomas