如何保护我的包或包体并签署我的导出Excel文件

http://msdn.microsoft.com/en-us/library/ms875215(v=EXCHG.65).aspx

        put_line(v_fileHandle,'<!--[if gte mso 9]><xml>');
        put_line(v_fileHandle,' <o:DocumentProperties>');
        put_line(v_fileHandle,'  <o:LastAuthor>'||LOWER(USER)||'</o:LastAuthor>');
        put_line(v_fileHandle,'  <o:LastSaved>'||v_lastSaved||'</o:LastSaved>');
        put_line(v_fileHandle,'  <o:Version>10.6626</o:Version>');

        -- Put your props here
        put_line(v_fileHandle,'  <o:Author>10.6626</o:Author>');

        put_line(v_fileHandle,' </o:DocumentProperties>');
        put_line(v_fileHandle,' <o:OfficeDocumentSettings>');
        put_line(v_fileHandle,'  <o:DownloadComponents/>');
        put_line(v_fileHandle,' </o:OfficeDocumentSettings>');
        put_line(v_fileHandle,'</xml><![endif]-->');