如何使用makeFile使用visual studio编译代码

I have just downloaded a open source project which is said to be compiled using visual studio c++. It contains 3 makeFiles (makeFile, makeFile(1) and makeFile(2) ) I always open programs in VS using the .sln files and now I dont know what to do with this makeFile. can anyone instruct me how to deal with it please.I have just downloaded a open source project wh