Please see my comment to the question. You did not give us any links, and probably did not try to find anything. Why?
Please see: Chatterbot Eliza
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However, finding the entry point in code won't be a problem anyway, if this code can be built at all, of course. :-)
tomikl wrote:When I unzip folder Chatterbot Eliza 2.0 source, I have a files: Eliza.cpp, Eliza.dsp, Eliza.dsw, Eliza.h, graphics.h, recorder.coo, recorder.h, strinds.cpp, strings.h, Tokenizer.cpp, Tokenizer.h. So I don't know which is main to open in <??? — SA> program like NEtBeans.
How come? Quite apparently, this is "Eliza.cpp". You really need to understand how the application entry point
Please see: http://en.wikipedia.org/wiki/Main_function