Thread: Errors compiling classes with VC++ 6.0

I'm currently trying to write a little program to display a openGl window using C++. I'm using VC++ 6.0.

When compiling I get this error:
error C2679: binary '=' : no operator defined which takes a right-hand operand of type 'class GlWindow *' (or there is no acceptable conversion)

Code:

//GlWindow.h
#ifndef _GLWINDOW_H_
#define _GLWINDOW_H_

#include <GL/glui.h>

class GlWindow{
private:
	int x, y, dimx, dimy, attr, ref;
	char *title;

public:
	GlWindow(char *_title);
	GlWindow();

	GlWindow& setPos(int _x, int _y);
	GlWindow& setDim(int _dx, int _dy);
	GlWindow& setAttr(int _attr);
	int show();
};
#endif

//main.c
#include <GL/glui.h>
#include "GlWindow.h"


void display(void){
	glClearColor(0.0, 0.0, 0.0, 0.0);
	glClear(GL_COLOR_BUFFER_BIT);
	glColor3f(1.0, 1.0, 1.0);
	glOrtho(-1.0, 1.0, -1.0, 1.0, -1.0, 1.0);
	glBegin(GL_POLYGON);
	glVertex2f(-0.5, -0.5);
	glVertex2f(-0.5, 0.5);
	glVertex2f(0.5, 0.5);
	glVertex2f(0.5, -0.5);
	glEnd();
	glutSwapBuffers();
}

void keyb(unsigned char key, int x, int y){
	if (key == 27) exit(0);
}

int main(int argc, char *argv[]){
	GlWindow win;

	win = new GlWindow("open Gl");
	win.setPos(100, 100).setDim(300, 300);
	win.show();

	glutKeyboardFunc(keyb);
	glutDisplayFunc(display);

	glutMainLoop();

	return 0;
}

Thanks in advance.

Arghhh!!
I'm terribly used to Java, and the implict pointer stuff...
sorry.