VB查询错误号，没搞明白这个源码是干什么的，可以顺利编译，编译后运行在输入框中输入数字号码，也就是错误号，具体是什么自己研究吧。-VB query error number, do not understand this source is doing, can be successfully compiled, the compiler runs in the input digital input box number, that is the wrong number, specifica