Thread: Abstract Base Class discription.

I just created an abstract base class called button that I will use as an interface button in a dirctdraw/network game I am creating.
Take a look and tell me if it looks ok.
I questioned one thing, can you make the destructor the pure virtual function?

Code:

#ifndef _BUTTON_H_
#define _BUTTON_H_

#include <ddraw.h>
#include <windows.h>
#include <windowsx.h>

class Button
{
public:
	Button();
	virtual IDirectDrawSurface * hover(IDirectDrawSurface * pddshovered,int width,int height); 
	virtual sfns * pressed(IDirectDrawSurface * pddspressed, int width, int height);
	virtual bool released(sfns * pscleansfns);
	virtual IDirectDrawSurface * display(IDirectDrawSurface * pddsbuttonsurface, int width, int height);
	virtual IDirectDrawSurface * erase(IDirectDrawSurface * pddsbackbufferclearsurface,int width, int height);  
	virtual ~Button(void) = 0;

private:
	STRUCT
	{
		IDirectSurface * pdds;
		int surfacewidth;
		int surfaceheight;
		int result;
	} sfns;
};//endclass

#endif;