Can't compile this with VC 6.0

I took this code from Andre LaMothe's Game Dev Series. The book is the Game Programming All-In-One by Bruno Miguel Teixeira de Sousa.
I can get this code to compile with the GNU g++ compiler, but the VC 6.0 compiler just won't do it. It give me a link error of:
LIBCD.lib(wincrt0.obj) : error LNK2001: unresolved external symbol _WinMain@16
Debug/IVA.exe : fatal error LNK1120: 1 unresolved externals

What kinda funny is that the code was written (according to the writer) with VC in mind.

Code:

---


#include <iostream>

using std::cout;
using std::endl;

void CalcIVA(long Money, double IVA = 0.17);

int main()
{
        cout << "Specifying the IVA value: $1000\n";
        CalcIVA (1000, 0.12);
        cout << "Using default IVA value: $1000\n";
        CalcIVA (1000);

        return 0;
}

void CalcIVA(long Money, double IVA)
{
        double MoneyWithIVA;
        MoneyWithIVA = Money * IVA;

        cout << "Money after IVA at " << IVA << " is " << MoneyWithIVA << endl;
}

---

Is there something wrong with the code, or is there something wrong with my VC 6.0 setup?

Thanks.

Any program written can be made to have linker errors with VC++. You didn't choose the right project settings when you created your project. You should have chosen Win32 console application.

It is a Win32 Console Project.
Just to be sure I went back and checked it. I think the problem is somewhere is the namespace declarations or with the header files. It seems like VC 6.0 REALLY likes you to include the "stdafx.h" header, but I thought I could skip this if I used namespaces.
If I pull out the namespaces and include the stdafx.h header I can get it to work. However, why doesn't anyone ever mention using this header?
Is there a way around using it for portability's sake?

"Just to be sure I went back and checked it."

How did you do that?

To check the code again, I copied it off of the CD (copy/paste) then ran it again.
It looks like the linker problem was do to me possibly selecting the wrong project type. Oops! I was getting a different error message when I tried this code the other day.

What's totally confusing is I JUST ran the code again to copy/paste the error message, and it ran fine without the stdafx.h and with the namespaces. I guess that answers my question. There has GOT to be something wrong with my installation of Visual Studio!

Thanks for all of the help.