Help with WinSock

So I'm trying to do some Windows programming. I've build a little server program which listens for a connection, receives 63 bytes and prints them. The thing is, everything works perfectly when I include winsock2.h and link to WS2_32.lib, but when I instead try to load the DLL at runtime using LoadLibrary, binding doesn't work (error code 10047: Address family not supported by protocol family.) even though the rest of the code is the same, and I've confirmed that even though I'm not including winsock2.h, the #defines have the correct values.
Any idea what might be wrong (aside programming for Windows in general)?

I haven't done any C coding in a while, but don't you need extra compile time flags for that?