如何隐藏文件-打开对话框中的特定控件？(使用CFileDialog创建的对话框)

class CMyFileDialog : public CFileDialog
{
public:
    CMyFileDialog(BOOL bOpenFileDialog, LPCTSTR lpszDefExt = NULL, LPCTSTR lpszFileName = NULL, DWORD dwFlags = OFN_HIDEREADONLY | OFN_OVERWRITEPROMPT, LPCTSTR lpszFilter = NULL, CWnd* pParentWnd = NULL)
        : CFileDialog(bOpenFileDialog, lpszDefExt, lpszFileName, dwFlags, lpszFilter, pParentWnd)
    {
    }

protected:
    virtual BOOL OnInitDialog()
    {
        BOOL bResult = CFileDialog::OnInitDialog();

        // 隐藏控件
        CWnd* pCtrl = GetDlgItem(IDC_MY_CONTROL); // 替换IDC_MY_CONTROL为需要隐藏的控件ID
        if (pCtrl != NULL)
        {
            pCtrl->ShowWindow(SW_HIDE);
        }

        return bResult;
    }
};

CMyFileDialog dlg(TRUE);
dlg.DoModal();