1.SetFocus另外一个控件

         GetDlgItem(另一个控件名)->SetFocus();

2.给要失去焦点的控件发WM_KILLFOCUS消息
        GetDlgItem(要失去焦点的控件名)->PostMessage(WM_KILLFOCUS, 0, 0);
        ::SendMessage(GetDlgItem(要失去焦点的控件名)-> m_hWnd,WM_KILLFOCUS,-1,0);
        SendDlgItemMessage(要失去焦点的控件名,WM_KILLFOCUS,0,0);