I thought of something and wondered if it were possible. How would one import a DLL into the program compile time (rather than run time) if it's already comipled?

you can create a DLL loader, append DLL as data, and pass it's address to loader that will load it when exe runs.

next time think about better thread name please

I am bad with names. I mean, common, look at my name on the forums. Trust me, you dont' want me to name your kids... Anyway!

As for creating a DLL loader. That would be the fun part. I could easily load the DLL into memory as a file variable. It's finding the address of functions for use with jmp or call that's hard.

don't forget to load DLL not byte-to-byte same as in file, but as loader does (section align 4096, instead of 512 in file). Then just look through DLL exports, and you can find functions that interest you

To be honest i really don't know where to start.

start by reading about PE format, and maybe try writing utility that will dump contents of PE headers, sections, tables etc... That will give you knowledge of PE format you need to manually load DLL

http://en.wikibooks.org/wiki/Reverse_Engineering/PE

Interesting concept, but can you give an example of how this would be useful?

when you want to add code to already existing binary for some reason. For example i did this in copy protector

Let's say you want to use fmod (for example) in a program but you don't want to go through all the rigamaroo of an installer file.