Hey, Anyone know how to add a dll file to a vb6 program?

Im trying to add a dll for reading maplestory wz files. Its called MapleLib.dll, I have no idea at all how to go about adding it though. I also would like to know if theres anyway to view the functions the dll has without opening the source (its hosted in an google code repository and I dont have anything to download the source, I know theres programs out there but I find most of them to be a hassle to work with)

Anyway How Can I use a dll with my visualbasic program? and how do i find out the functions inside the dll