Expert interface descriptions

 
I am trying to write an Expert and noticed that there are several interfaces that are used within an Expert - such as: MarketInfo(), Print(), iMACD(), iMA(), etc. I will also be writing some custom indicators. Is there some documentation on these interfaces? I searched for on the MetaQuotes website but couldn't find anything.

Thanks,
VTrader
 
see MetaEditor dictionary, our samples, and our site
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