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I need someone help me to find AutoLISP help by ".chm" not ".htm" ,thanks!
I think this was your question.. If using Windows XP try this:
I'm running 2010 so your folder may say 2011 instead.. the point is find the HELP folder and look for ACAD_Dev180.chm.
I know links are broken in the help menu when you press F1 in autocad.
C:\Program Files\AutoCAD Civil 3D 2010\Help\acad_dev180.chm
Looks like with 2011 the help file is ACAD_Dev181.chm
Have you checked the AutoDesk Knowledge Base? I think it should still be available there.