void CDlgSCManage::OnRadioPpt()
{
    CWnd *pWnd = this->GetDlgItem(IDC_RADIO_PPT);
    CButton *pB = (CButton *)pWnd;
    pB->SetCheck(1);
    m_lSCType = 3;
    GetSCToList(m_lSCType);
    m_CtrlWeb.MoveWindow(380,30,400,390);
    m_pPlay->MoveWindow(0,0,0,0);

}这个函数里的前面3句代码不是很清楚，小菜求问，拜谢了！

获取一个ID为：IDC_RADIO_PPT的（单选框）控件，把它置为选中状态