How to resolve externals ?

Here is the situation:

- point.h define a class Point and contains prototype definitions of all its methods.
- point.cpp defines all its methods.
- myProg2.cpp is a program that instantiates class Point.

I have created a DLL, point.dll as follows:
cl -GX -LD point.cpp -Fepoint.dll

I tried the following to build the binary but got link errors:

G:\C++\DLL>cl -GX myProg2.cpp
Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 12.00.8168 for 80x86
Copyright (C) Microsoft Corp 1984-1998. All rights reserved.

myProg2.cpp
Microsoft (R) Incremental Linker Version 6.00.8168
Copyright (C) Microsoft Corp 1992-1998. All rights reserved.

/out:myProg2.exe
myProg2.obj
myProg2.obj : error LNK2001: unresolved external symbol "public: __thiscall point::point(double,double)" (??0point@@QAE@NN@Z)
myProg2.exe : fatal error LNK1120: 1 unresolved externals

Question: How do I resolve the 'unresolved externals' ???

----------------- start of point.h ------------------------
// point.h
class point {
  private:
    double  x;
    double  y;
  public:
    point();
    point (double, double);
    void printPoint();
    double getX();
    double getY();
    void setX(double);
    void setY(double);
};
----------------- end of point.h ------------------------

----------------- start of point.cpp ------------------------
// point.cpp
#include <iostream>
#include "point.h"

using namespace std;

// default constructor
point::point() {
  x = 0.0;
  y = 0.0;
}

// constructor with params
point::point(double pointX, double pointY) {
  x = pointX;
  y = pointY;
}

double point::getX() {
  return x;
}

double point::getY() {
  return y;
}

void point::setX(double pX) {
  x = pX;
}

void point::setY(double pY) {
  y = pY;
}

void point::printPoint() {
  cout << "Class point: x=" << x << " y=" << y << " ";
}
----------------- end of point.cpp ------------------------

----------------- start of myProg2.cpp ------------------------
// Example2: file myProg2.cpp
#include <iostream.h>
#include "point.h"
int main()
{
  cout << "Hello, world!\n";

 // create instances of two point, p1 & p2
 point p1(4.0, 4.0), p2(5.0, 5.0);

  return 0;
}
----------------- end of myProg2.cpp ------------------------