采用vb语言实现dtu模块与服务器之间的通信，通信部分通过加载DTULib.dll实现-Dtu using vb language communication between the module and the server, the communication part achieved by loading DTULib.dll

短信群发软件 运行本程序前应安装金仓短信王标准商务版DG-C1A驱动程序，安装完驱动还需要在程序中加载dllforvc.dll文件。 -Bulk SMS Software Should be installed before running this program Kanakura SMS King Standard Business Edition DG-C1A drivers, installing the drivers also need to load dllforvc.