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Remote Control PCs

, 20 Sep 2013
Two projects that work together to remote control PCs across a LAN.
// Remote Desktop Server and Client
// CTrayIcon Copyright 1996 Microsoft Systems Journal, by Paul DiLascia

#include "stdafx.h"
#include "trayicon.h"
#include <afxpriv.h>		// for AfxLoadString

IMPLEMENT_DYNAMIC(CTrayIcon, CCmdTarget)

CTrayIcon::CTrayIcon(UINT uID)
{
	// Initialize NOTIFYICONDATA
	memset(&m_nid,0,sizeof(m_nid));
	m_nid.cbSize = sizeof(m_nid);
	m_nid.uID = uID;

	// Use resource string as tip if there is one
	AfxLoadString(uID,m_nid.szTip,sizeof(m_nid.szTip));
}

CTrayIcon::~CTrayIcon()
{
	// Remove icon from system tray
	SetIcon(0);
}

// Set notification window. It must created already.
void CTrayIcon::SetNotificationWnd(CWnd* pNotifyWnd, UINT uCbMsg)
{
	// If the following assert fails, you're probably
	// calling me before you created your window. Oops.
	ASSERT(pNotifyWnd==NULL || ::IsWindow(pNotifyWnd->GetSafeHwnd()));
	m_nid.hWnd = pNotifyWnd->GetSafeHwnd();

	ASSERT(uCbMsg==0 || uCbMsg>=WM_USER);
	m_nid.uCallbackMessage = uCbMsg;
}

// Sets both the icon and tooltip from resource ID, to remove the icon, call SetIcon(0)
BOOL CTrayIcon::SetIcon(UINT uID)
{ 
	HICON hicon = NULL;
	if (uID)
	{
		AfxLoadString(uID, m_nid.szTip, sizeof(m_nid.szTip));
		hicon = AfxGetApp()->LoadIcon(uID);
	}
	return SetIcon(hicon, NULL);
}

// Common SetIcon for all overloads. 
BOOL CTrayIcon::SetIcon(HICON hicon, LPCSTR lpTip) 
{
	UINT msg;
	m_nid.uFlags = 0;

	// Set the icon
	if (hicon)
	{
		// Add or replace icon in system tray
		msg = m_nid.hIcon ? NIM_MODIFY : NIM_ADD;
		m_nid.hIcon = hicon;
		m_nid.uFlags |= NIF_ICON;
	}
	else
	{
		// remove icon from tray
		if (m_nid.hIcon==NULL)
			return TRUE;
		msg = NIM_DELETE;
	}

	// Use the tip, if any
	if (lpTip)
		strncpy(m_nid.szTip, lpTip, sizeof(m_nid.szTip));
	if (m_nid.szTip[0])
		m_nid.uFlags |= NIF_TIP;

	// Use callback if any
	if (m_nid.uCallbackMessage && m_nid.hWnd)
		m_nid.uFlags |= NIF_MESSAGE;

	// Do it
	BOOL bRet = Shell_NotifyIcon(msg, &m_nid);
	if (msg==NIM_DELETE || !bRet)
		m_nid.hIcon = NULL;	// failed
	return bRet;
}

BOOL CTrayIcon::SetIcon(LPCTSTR lpResName,LPCSTR lpTip)
{
	return SetIcon(lpResName ? AfxGetApp()->LoadIcon(lpResName) : NULL, lpTip);
}

// Default event handler handles right-menu and doubleclick.
LRESULT CTrayIcon::OnNotifyTray(WPARAM wID, LPARAM lEvent)
{
	if (wID!=m_nid.uID || (lEvent!=WM_RBUTTONUP && lEvent!=WM_LBUTTONDBLCLK))
		return 0;

	// If there's a resource menu with the same ID as the icon, use it as 
	// the right-button popup menu. CTrayIcon will interprets the first
	// item in the menu as the default command for WM_LBUTTONDBLCLK
	// 
	CMenu menu;
	if (!menu.LoadMenu(m_nid.uID))
		return 0;
	CMenu* pSubMenu = menu.GetSubMenu(0);
	if (!pSubMenu) 
		return 0;

	if (lEvent==WM_RBUTTONUP)
	{
		// Make first menu item the default (bold font)
		::SetMenuDefaultItem(pSubMenu->m_hMenu, 0, TRUE);

		// Display the menu at the current mouse location. There's a "bug"
		// (Microsoft calls it a feature) in Windows 95 that requires calling
		// SetForegroundWindow. To find out more, search for Q135788 in MSDN.
		//
		CPoint mouse;
		GetCursorPos(&mouse);
		::SetForegroundWindow(m_nid.hWnd);	
		::TrackPopupMenu(pSubMenu->m_hMenu, 0, mouse.x, mouse.y, 0,
			m_nid.hWnd, NULL);
	}
	else  // double click: execute first menu item
		::SendMessage(m_nid.hWnd, WM_COMMAND, pSubMenu->GetMenuItemID(0), 0);

	return 1; // handled
}

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This article, along with any associated source code and files, is licensed under The GNU General Public License (GPLv3)

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About the Author

Andy Bantly
Founder
United States United States
Working as a software developer since 1989. Started out with Basic, FORTRAN and JCL, moved into Visual Basic 1.0, C, then C++, and now I work mainly in C++ using MFC, Win32, and ATL/COM. I use Microsoft Products only because that is what gives me gainful employment. Through work, I have a lot of experience with HTML, JavaScript, XSL transformations, the XMLHTTP object, PHP 4.x, and simple COM object integrations.
 
I've worked for the University of Oklahoma in the school of meteorology (Go SOONERS!), consulting, and now as a Senior Software Engineer. These things keep my lights on and electricity going. My dream job is to own a bowling alley and rub elbows with pro-bowlers! I'm also an avid pedicab driver and have my own cab. I like the hustle of picking up people in downtown and biking them to their destination.
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