托盘右击弹出菜单问题~~~~~~~HELP~~

[tgwang]

托盘右击弹出菜单，然后不选菜单项，随便点击其他位置，菜单仍存在，怎么让它能自动消失~~~
我的代码:
afx_msg void CShellDlg::OnNotifyIcon(WPARAM wParam, LPARAM lParam)
{
POINT point;
CMenu menu;
GetCursorPos(&rpoint);
if ((wParam == IDI_ICON)&&(lParam == WM_LBUTTONDOWN))
{
ShowWindow(SW_SHOWNORMAL);
Shell_NotifyIcon(NIM_DELETE, &nd);

}
if((wParam == IDI_ICON)&&(lParam == WM_RBUTTONDOWN))
{
menu.LoadMenu(IDR_MENU1);
menu.GetSubMenu(0)->TrackPopupMenu(TPM_LEFTALIGN |
TPM_RIGHTBUTTON,point.x, point.y, this);

}
}

[李马]

if((wParam == IDI_ICON)&&(lParam == WM_RBUTTONDOWN))
{
menu.LoadMenu(IDR_MENU1);
SetForegroundWindow(); // 在TrackPopupMenu前加上这句
menu.GetSubMenu(0)->TrackPopupMenu(TPM_LEFTALIGN | TPM_RIGHTBUTTON,point.x, point.y, this);

}