MFC下托盘图标的实现和托盘菜单

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对话框头文件XXXDlg.h:

1.添加成员变量

NOTIFYICONDATA m_nid;

2.添加tray消息响应函数的声明

afx_msg LRESULT OnTrayNotify(WPARAM wParam, LPARAM lParam);

对话框实现文件XXXDlg.cpp:
1.定义tray消息 

#define UM_TRAYNOTIFY WM_USER + 11

2.CXXXDlg的构造函数添加

memset(&m_nid, 0, sizeof(m_nid)); // Initialize NOTIFYICONDATA struct
m_nid.cbSize = sizeof(m_nid);
m_nid.uFlags = NIF_ICON | NIF_TIP | NIF_MESSAGE;

3.CXXXDlg的析构函数添加

m_nid.hIcon = NULL;
Shell_NotifyIcon(NIM_DELETE, &m_nid);

4.添加消息映射：

BEGIN_MESSAGE_MAP(CMFC2Dlg, CDialog)
//...
ON_MESSAGE(UM_TRAYNOTIFY, &CMFC2Dlg::OnTrayNotify)
//...
END_MESSAGE_MAP()

5.OnInitDialog函数添加：

m_nid.hWnd = GetSafeHwnd();
m_nid.uCallbackMessage = UM_TRAYNOTIFY;
// Set tray icon and tooltip
m_nid.hIcon = m_hIcon;
// Set tray notification tip information
CString strToolTip = _T("托盘程序");
_tcsncpy_s(m_nid.szTip, strToolTip, strToolTip.GetLength());
Shell_NotifyIcon(NIM_ADD, &m_nid);

6.OnTrayNotify函数的实现：

LRESULT CXXXDlg::OnTrayNotify(WPARAM wParam, LPARAM lParam)
{
UINT uMsg = (UINT)lParam;
switch(uMsg)
{
case WM_RBUTTONUP:
{
//右键处理
CMenu menuTray;
CPoint point;
int id;
GetCursorPos(&point);

menuTray.LoadMenu(IDR_MENU_TRAY);
id = menuTray.GetSubMenu(0)->TrackPopupMenu(TPM_RETURNCMD | TPM_LEFTALIGN|TPM_RIGHTBUTTON, point.x, point.y, this);
#if 0
CString strInfo;
strInfo.Format(L"menuid %d", id);
LPCTSTR strtmp;
strtmp = strInfo.GetBuffer(0);
MessageBox(strtmp, L"test");
#endif
switch(id){
case IDR_TRAY_EXIT:
OnOK();
break;
case IDR_TRAY_RESTORE:
//窗口前端显示
SetForegroundWindow();
ShowWindow(SW_SHOWNORMAL);
break;
default:
break;
}
break;
}
case WM_LBUTTONDBLCLK:
SetForegroundWindow();
ShowWindow(SW_SHOWNORMAL);
break;
default:
break;
}
return 0;
}

7.添加WM_SIZE消息处理：

void CMFC2Dlg::OnSize(UINT nType, int cx, int cy)
{
CDialog::OnSize(nType, cx, cy);
if(nType == SIZE_MINIMIZED){
ShowWindow(SW_HIDE);
}
}

8.菜单
添加菜单资源 , 比如IDR_MENU_TRAY.

定义一个子菜单Tray，有若干个菜单项，比如“恢复窗口”, ID是IDR_TRAY_RESTORE，“退出”, ID是IDR_TRAY_EXIT。

在OnTrayNotify函数中捕获右击消息，弹出菜单，参考第6步。

至此，添加托盘的功能基本完成。