VB引入了 控件 的概念，使得大量已经编好的 VB 程序可以被直接拿来使用。使得程序设计特别是界面设计非常简单、 直观、 明了。 VB 也有它的局限性，对于数值计算特别是矩阵运算方面的能力不足。-VB introduced the concept of　control , so that a large number of already programmed VB program can be directly used to use. It makes the program especially designed to interface design is very simple, intuitive and clear. VB has its limitations, especially for numerical matrix operations aspects of lack of capacity.