是否可以实时显示经过的时间

大家好，全部如标题所示。
我一直在使用“计时器”功能来计算测试中的总时间成本。
但是，使用计时器，它只能在程序结束时显示总时间。
但我想实现以下功能。
启动按钮，启动程序后，将实时显示经过的时间，直到程序结束。
我搜索了帮助文件，发现“日期/时间可用于通过数学比较两者来计算过去和当前事件之间的经过时间。”
在日期/时间项目中。
我尝试过但失败了。
非常感谢您的帮助！
你的，伊柳



     以下为原文

  Hi, all

as shown in the title.  

I have been using the "timer" function to calculate the total time cost in the test. However, with timer, it can display the total time only when the program ends. But I would like to realize the following function.  

A start button, after starting the program, the elapsed time will be displayed real-time till the program ends.

I searched the help file and found  

"Date/Time can be used to calculate elapsed time between a past and current event by comparing the two mathematically."  

in the Date/Time item. I tried and failed.  

Your help is highly appreciated!

Yours,
Yiliu