托盘图标的添加和消息响应

#define WM_ICON_NOTIFY        WM_USER + 2
...
BOOL CMyDlg::OnInitDialog()
{
...
NOTIFYICONDATA nid;

nid.cbSize = sizeof nid;
nid.hWnd = GetSafeHwnd();
nid.uID = IDR_MAINFRAME;
nid.hIcon = m_hIcon;
nid.uCallbackMessage = WM_ICON_NOTIFY;
nid.uFlags = NIF_MESSAGE | NIF_ICON;

Shell_NotifyIcon(NIM_ADD, &nid);
...

BEGIN_MESSAGE_MAP(CMyDlg, CDHtmlDialog)
...
ON_MESSAGE(WM_ICON_NOTIFY, &CMyDlg::OnIconNotify)
END_MESSAGE_MAP()

afx_msg LRESULT CMyDlg::OnIconNotify(WPARAM wParam, LPARAM lParam)
{
switch(lParam)
{
case WM_LBUTTONUP:
case WM_RBUTTONUP:
SendMessage(WM_SYSCOMMAND, SC_RESTORE);
SetForegroundWindow();
break;
default:
break;
}
return 0;
}