Flasher.h

//  Copyright (C) 1999 AT&T Laboratories Cambridge. All Rights Reserved.
//
//  This file is part of the VNC system.
//
//  The VNC system is free software; you can redistribute it and/or modify
//  it under the terms of the GNU General Public License as published by
//  the Free Software Foundation; either version 2 of the License, or
//  (at your option) any later version.
//
//  This program is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//  GNU General Public License for more details.
//
//  You should have received a copy of the GNU General Public License
//  along with this program; if not, write to the Free Software
//  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
//  USA.
//
// If the source code for the VNC system is not available from the place 
// whence you received this file, check http://www.uk.research.att.com/vnc or contact
// the authors on vnc@uk.research.att.com for information on obtaining it.


#pragma once

// Flasher is used with the AT&T internal version of VNC, when the user may need to 
// choose which monitor in a room should be used to display his desktop. A server can
// connect to a listening viewer and flash the boundary of the screen, typically displaying
// the userid of the person doing the flashing at the same time.
// Not used in the external version.

class Flasher  
{
public:
	Flasher(int port);
	virtual ~Flasher();
	static void CloseScreenSaver();
	static LRESULT CALLBACK WndProc(HWND hwnd, UINT iMsg, WPARAM wParam, LPARAM lParam);
protected:
	SOCKET m_sock;
	HWND m_hwnd;
	HFONT m_hfont;
};