NOW函数只有工作表计算时或者含有此函数的宏运行时会改变。
The NOW function changes only when the worksheet is calculated or when a macro that contains the function is run.
这使您可以在每次宏运行时重置发生时自动重新初始化变量和事件处理程序。
This allows you to automatically re-initialize variables and event handlers whenever a macro runtime reset occurs.
一旦接收到一个后续屏幕，操作就会在这个屏幕上运行，而宏则接着寻找其他后续屏幕。
Once a next-screen is received, actions are run on that screen, and the macro then looks for the next screen.
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