用VB编的关于四点画曲线的程序，是形成曲线的基本原理，十分简单方便，通俗易懂-VB series on the four dotted curve procedures, form the basic tenets of curves, very simple, convenient and easily understood

数据库在VB界面上的实现.如何实现数据库登陆界面、以何种形式登陆、销售系统界面等-in VB database interface is achieved. How landing database interface, in whatever form, landing, sales system interface