The description of the features common to MC.NET and regular MultiCharts (i.e. charting, manual and auto trading, data management etc.) can be found [http://www.multicharts.com/trading-software/index.php/Main_Page here].
PowerLanguage .NET Help file with description of all the functions is located in PowerLanguage .NET Editor itself and can be also downloaded [http://www.multicharts.com/downloads/PowerLanguage.NET.chm here].