提取windows自带的文件后缀为dbx的outlook邮件，以发信时间为检索标准，将符合条件的邮件封装成eml格式提出-Extraction windows that comes with the file extension dbx Outlook e-mail, letter time for the search criteria will be eligible mail package into eml format

dbx是outlook express生成的文件,本代码是对该格式文件进行解析操作.-dbx outlook express files generated by the code to parse the format and file.