Thanks for that rapid reply!
In the fourth approach, I have compiled the functions R_proxy_init(), R_proxy_evaluate_noreturn(), R_proxy_term() and the callback functions defined in Baiers code directly into my application (I got them from the R source distribution and commented out the other functions). Rproxy.dll is not on my path.
When I look through the R_proxy_init() it does the same things that are done in the rtest example (as far as I can tell). Hence, I thought that I was calling R itself when initialising the dll.
I am using Baiers function R_proxy_evaluate_noreturn() because it seemed wiser to use code that was written by someone who knows what they are doing than roll my own! I don't understand enough about R IO functions to feel comfortable using them and am having trouble finding doco on them. I'm slowly learning about them, and the rest of R, by reading the code. Is there any doco on around on these and the R source in general?
Thanks again for the rapid reply
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