二、编程步骤
1、 启动Visual C++6.0，生成一个单文档的应用程序TrayTest，取消文档视图支持；
2、 在CMainFrame类中添加自定义消息#define WM_MY_TRAY_NOTIFICATION WM_USER+0，并在该类中为此自定义消息手动添加消息映射ON_MESSAGE(WM_MY_TRAY_NOTIFICATION, OnTrayNotification)和消息响应函数afx_msg LRESULT OnTrayNotification(WPARAM wp, LPARAM lp)；
3、 设计二个图标添加到项目中，其ID标志分别为"IDI_MYICON"、"IDI_MYICON2"，作为托盘显示时的图标；
4、 在CMainFrame类中添加下述变量： CTrayIcon m_trayIcon（用来操作图标的类对象）、CEdit m_wndEdit（编辑框用来显示所跟踪到的鼠标消息）、int m_iWhichIcon（决定当前托盘使用哪个图标）、BOOL m_bShutdown（是否关闭当前拖盘程序标志）、BOOL m_bShowTrayNotifications（是否显示托盘消息标志）；
5、 为程序的IDR_MAINFRAME添加处理菜单项和托盘的上下文菜单IDI_TRAYICON（具体的菜单项的标题和ID标志符参见代码部分），然后使用Class Wizard为各个菜单项添加处理函数；
6、 添加代码，编译运行程序。
///////////////////////////////////////////////CTrayIcon类的头文件；
#ifndef _TRAYICON_H
#define _TRAYICON_H
class CTrayIcon : public CCmdTarget {
protected:
DECLARE_DYNAMIC(CTrayIcon)
NOTIFYICONDATA m_nid; // struct for Shell_NotifyIcon args
public:
CTrayIcon(UINT uID);
~CTrayIcon();
// Call this to receive tray notifications
void SetNotificationWnd(CWnd* pNotifyWnd, UINT uCbMsg);
BOOL SetIcon(UINT uID); // main variant you want to use
BOOL SetIcon(HICON hicon, LPCSTR lpTip);
BOOL SetIcon(LPCTSTR lpResName, LPCSTR lpTip)
{ return SetIcon(lpResName ?
AfxGetApp()->LoadIcon(lpResName) : NULL, lpTip); }
BOOL SetStandardIcon(LPCTSTR lpszIconName, LPCSTR lpTip)
{ return SetIcon(::LoadIcon(NULL, lpszIconName), lpTip); }
virtual LRESULT OnTrayNotification(WPARAM uID, LPARAM lEvent);
};
#endif
///////////////////////////////////////////////////CTrayIcon类的.CPP文件
#include "stdafx.h"
#include "trayicon.h"
#include
IMPLEMENT_DYNAMIC(CTrayIcon, CCmdTarget)
CTrayIcon::CTrayIcon(UINT uID)
{
memset(&m_nid, 0 , sizeof(m_nid)); // Initialize NOTIFYICONDATA
m_nid.cbSize = sizeof(m_nid);
m_nid.uID = uID; // never changes after construction
AfxLoadString(uID, m_nid.szTip, sizeof(m_nid.szTip));
// Use resource string as tip if there is one
}
CTrayIcon::~CTrayIcon()
{
SetIcon(0); // remove icon from system tray
}
void CTrayIcon::SetNotificationWnd(CWnd* pNotifyWnd, UINT uCbMsg)
{
// Set notification window. It must created already.
ASSERT(pNotifyWnd==NULL ::IsWindow(pNotifyWnd->GetSafeHwnd()));
m_nid.hWnd = pNotifyWnd->GetSafeHwnd();
ASSERT(uCbMsg==0 uCbMsg>=WM_USER);
m_nid.uCallbackMessage = uCbMsg;
}
BOOL CTrayIcon::SetIcon(UINT uID)
{
// Sets both the icon and tooltip from resource ID ，To remove the icon, call SetIcon(0)
HICON hicon=NULL;
if (uID) {
AfxLoadString(uID, m_nid.szTip, sizeof(m_nid.szTip));
hicon = AfxGetApp()->LoadIcon(uID);
}
return SetIcon(hicon, NULL);
}
BOOL CTrayIcon::SetIcon(HICON hicon, LPCSTR lpTip)
{
// Common SetIcon for all overloads.
UINT msg;
m_nid.uFlags = 0;
if (hicon) {
// Set the icon
msg = m_nid.hIcon ? NIM_MODIFY : NIM_ADD;
m_nid.hIcon = hicon; // Add or replace icon in system tray
m_nid.uFlags = NIF_ICON;
} else {
if (m_nid.hIcon==NULL) // remove icon from tray
return TRUE; // already deleted
msg = NIM_DELETE;
}
if (lpTip) // Use the tip, if any
strncpy(m_nid.szTip, lpTip, sizeof(m_nid.szTip));
if (m_nid.szTip[0])
m_nid.uFlags = NIF_TIP;
if (m_nid.uCallbackMessage && m_nid.hWnd) // Use callback if any
m_nid.uFlags = NIF_MESSAGE;
BOOL bRet = Shell_NotifyIcon(msg, &m_nid); // Do it
if (msg==NIM_DELETE !bRet)
m_nid.hIcon = NULL; // failed
return bRet;
}
LRESULT CTrayIcon::OnTrayNotification(WPARAM wID, LPARAM lEvent)
{
if (wID!=m_nid.uID (lEvent!=WM_RBUTTONUP && lEvent!=WM_LBUTTONDBLCLK))
return 0;
CMenu menu;//装载上下文菜单；
if (!menu.LoadMenu(m_nid.uID))
return 0;
CMenu* pSubMenu = menu.GetSubMenu(0);
if (!pSubMenu)
return 0;
if (lEvent==WM_RBUTTONUP) {//设置第一个菜单项为默认菜单项目
::SetMenuDefaultItem(pSubMenu->m_hMenu, 0, TRUE);
//将当前菜单作为上下文菜单；
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;
}
///////////////////////////////// MainFrm.h : interface of the CMainFrame class
#if !defined(AFX_MAINFRM_H__9ED70A69_C975_4F20_9D4E_B2877E3575D0__INCLUDED_)
#define AFX_MAINFRM_H__9ED70A69_C975_4F20_9D4E_B2877E3575D0__INCLUDED_
#if _MSC_VER >1000
#pragma once
#endif // _MSC_VER >1000
#include "trayicon.h"
class CMainFrame : public CFrameWnd
{
public:
CMainFrame();
protected:
DECLARE_DYNAMIC(CMainFrame)
// Attributes
public:
// Overrides
// ClassWizard generated virtual function overrides
//{{AFX_VIRTUAL(CMainFrame)
//}}AFX_VIRTUAL
// Implementation
public:
virtual ~CMainFrame();
#ifdef _DEBUG
virtual void AssertValid() const;
virtual void Dump(CDumpContext& dc) const;
#endif
protected: // control bar embedded members
CStatusBar m_wndStatusBar;
CTrayIcon m_trayIcon; // my tray icon
CEdit m_wndEdit; // to display tray notifications
int m_iWhichIcon; // which HICON to use
BOOL m_bShutdown; // OK to terminate TRAYTEST
BOOL m_bShowTrayNotifications; // display info in main window
// Generated message map functions
protected:
//{{AFX_MSG(CMainFrame)
afx_msg LRESULT OnTrayNotification(WPARAM wp, LPARAM lp);
afx_msg int OnCreate(LPCREATESTRUCT lpCreateStruct);
afx_msg void OnToggleIcon();
afx_msg void OnViewClear();
afx_msg void OnViewNotifications();
afx_msg void OnUpdateViewClear(CCmdUI* pCmdUI);
afx_msg void OnUpdateViewNotifications(CCmdUI* pCmdUI);
afx_msg void OnClose();
afx_msg void OnAppOpen();
afx_msg void OnAppSuspend();
// NOTE - the ClassWizard will add and remove member functions here.
// DO NOT EDIT what you see in these blocks of generated code!
//}}AFX_MSG
DECLARE_MESSAGE_MAP()
};
///////////////////////////////////////////////CMainFrm.cpp
#include "stdafx.h"
#include "TrayTest.h"
#include "MainFrm.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif