如何删除MFC中CPropertySheet中的默认帮助按钮？

class CMyPropertySheet : public CPropertySheet
{
    ...
    protected:
        virtual BOOL OnInitDialog();
    ...
};

BOOL CMyPropertySheet::OnInitDialog()
{
    BOOL bResult = CPropertySheet::OnInitDialog();

    // 获取帮助按钮的句柄
    HWND hWndHelpButton = ::GetDlgItem(GetSafeHwnd(), IDHELP);

    // 隐藏帮助按钮
    if (hWndHelpButton != NULL)
    {
        ::ShowWindow(hWndHelpButton, SW_HIDE);
    }

    return bResult;
}

CMyPropertySheet::CMyPropertySheet(UINT nIDCaption, CWnd* pParentWnd, UINT iSelectPage)
    : CPropertySheet(nIDCaption, pParentWnd, iSelectPage)
{
    // 移除帮助按钮的ID，以防止用户仍然可以通过键盘访问它
    CString strCaption;
    strCaption.LoadString(nIDCaption);
    RemoveControl(IDHELP, strCaption);
}