发票打印系统的软件,其采用windows api进行打印机的操作和用户密码的MD5算法加密.其中MD5加密算法文件直接用了FileZilla的源代码.-invoice printing system software, its windows api used for the operation of the printer and user password encryption algorithm MD5. which MD5 Encryption Algorithm documents d

发票登记单机版，基于VisualBasic6程序源码，平台VB、数据库为access，系统较小，功能齐全，主要完成增值税发票的录入，详单对应录入，税额计算，税率计算、单价计算等，比较实用，易用2年，无错！ -Invoice registration stand-alone version, based VisualBasic6 program source code, platform VB, database access, the system smaller, fully function