How Can I get All Megafunctions user guide in Quartus ?

http://www.altera.com/literature/lit-ip.jsp

thanks to "parrado".

There is no single doc since it would be thicker than a phone book :). If you search for "megafunction" in the Quartus II online help it'll list all the cores by type which you can navigate to their documentation.

thanks to "Badomen",i don't think you are a bad men:) :p