Extraction in vb6?

[Koga73]

Alright... im using vb6 and SFmpqapi. What would be the simplest way to open a .w3x archive and extract the war3map.j file. I need my program to do this so it can then edit it. Im not quite sure exactally what to use within the mpqapi tho. I have a copy of the WinMPQ source file (made in vb6) but it is quite confusing. There is alot of checks and calls to other subs and functions such to make sure the mpq is valid. I just wanna know the simplest way to do this. It should only be a few lines long (hopefully).