error LNK2019: unresolved external symbol _main referenced in function ___tmainCRTStartup

Even if your project has a main() method, the linker sometimes gets confused. You can solve this issue in Visual Studio 2010 by going to

Project -> Properties -> Configuration Properties -> Linker -> System

and changing SubSystem to Console.

We also had this problem. My colleague found a solution. It turned up to be a redefinition of "main" in a third party library header:

#define main    SDL_main

So the solution was to add:

#undef main

before our main function.

This is clearly a stupidity!

if you have _tmain function in your projects you need to include <tchar.h>.