The process marked with a double ring is an error trapping process 使用双环标记的进程为错误捕获进程。
2.
Statement turns off error trapping 语句关闭错误捕获。
3.
Implements error trapping on the asynchronous batch work that is submitted by the 对象提交的异步批处理工作上实现错误捕获。
4.
Is used to implement error trapping on the asynchronous batch work that is submitted by the 对象提交的异步批处理工作上实现错误捕获。
5.
On error resume next statement is used to defer error trapping so that the context for the error generated by the next statement can be known for certain 语句将被用于推迟错误捕获，以确保能够肯定知道下一条语句所生成的错误所处的环境。
6.
System errors during calls to windows dynamic - link libraries dlls do not raise exceptions and cannot be trapped with visual basic error trapping 调用windows动态链接库( dll )时产生的系统错误并不引发异常，因而无法使用visual basic错误捕获机制进行捕获。
