link error in compilation

There are 3 modes of code generation:

single threaded - uses libc.lib
multithreaded - uses libcmt.lib
multithreaded dll - uses msvcrt.lib

It looks like your build is set to use multithreaded dll. Question is whether it is a multithreaded program. If it isn't, change the code generation to single threaded. Alternatively, just try multithreaded instead of multithreaded dll. The only advantage that multithreaded dll gives you is a smaller library. The problem is that it is slower to load and has to link with msvcrt.dll at run time: what MS call dynamic linking - hence DLL, Dynamic Link Library.

You end up with a bigger library but once it has been built it is the end of your problems. If you choose multithreaded dll and go on to, say, a Vista system, your program will not run. You need to pull over a whole load of msvcrt... libs from your build environment because stuff of the VS6 vintage does not come with XP or Vista.