Hi, I'm currently trying to learn WinSock coding from http://johnnie.jerrata.com/winsocktutorial/ however when I compile my listening socket, I get 9 'error LNK2019: unresolved external symbol' errors. They all look to be the same function names that are used in the code prefixed with an underscore after the function name it says 'referenced in function _WinMain@16'
What is an unresolved external and how do I go about fixing one? I can post the code if needed but it's all visibile on that link. I'm using Visual Studios 2010, Win32 project.