Pointer to function isn't exactly working

I have this code

Code:

---

#include <iostream>
#include <conio.h>

using namespace std;

double Area(double, double);

int main() {
double(*pArea)(double, double);
pArea = Area;
double Length, Width;
cout << "Enter the length and width of your rectangle " << endl;
cin >> Length >> Width;
        return 0;
}

---

And guess what, this code doesn't compile! Whaddya know. I get this error
--------------------Configuration: pointertofunction - Win32 Debug--------------------
Compiling...
pointertofunction.cpp
Linking...
pointertofunction.obj : error LNK2001: unresolved external symbol "double __cdecl Area(double,double)" (?Area@@YANNN@Z)
Debug/pointertofunction.exe : fatal error LNK1120: 1 unresolved externals
Error executing link.exe.


I dont' have MSDN so I have no clue what this error means. It seems as though this code SHOULD work, please tell me why it in fact doesn't.
thanks in advanced

NEVERMIND, I DID NOT INCLUDE THE FUNCTION DEFINITION, IT COMPILES NOW, HOW SILLY OF ME

I'VE FIXED EVERYTHING IT WORKS :)

That's because the linker can't find the code for the function Area.
You must add this function to your code or link the correct library to your project.

Sorry, dindn't read your last line..:D