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, specifically what they study it.