word 导出

Question

要设置导出的word 页面的字体大小 为 5号 ，该如何处理啊  ，代码  public void btnPrint_Click()
    {
                OutPut("online;filename=out.doc", "application/ms-word");           }
    private void OutPut(string fileType, string strType)
    {
        Response.Clear();
        Response.Buffer = true;
        Response.Charset = "GB2312";
        Response.AppendHeader("Content-Disposition", fileType);
        Response.ContentType = strType;
        this.EnableViewState = false;
        System.IO.StringWriter swOut = new System.IO.StringWriter();
        HtmlTextWriter hTw = new HtmlTextWriter(swOut);
        this.RenderControl(hTw);
        Response.Write(swOut.ToString());
        Response.End();
    }  怎么改啊