QuartusII: add a new module into a project

[Altera_Forum]

Hi all, 

i want to change my VHDL project adding a new VHDL module. How can I do this?  P.S. I've already the .bdf file, so how can I use it to add my new VHDL module in the project?  Thanks a lot.  Lorenzo

[Altera_Forum]

open the VHDL file in quartus. Make sure the source code is added to the project file list. 

goto File -> Create/update -> Create symbol file.   Then in your top level BDF double click anywhere and now your modules should be available to place in the BDF.  NOTE: You cannot simulate BDF files directly. You have to either convert them to HDL or compile them for a (slow) netlist simulation. The best option is just to make the whole design HDL.