If at any point in the code, an error occurs such that processing cannot continue, we retrieve the system error message (if any), and display it along with our own message.

如果代码中任何一处出现了使处理不能继续进行之类的错误，那么我们会检索系统错误消息(如果有的话)，然后将它与我们自己的消息一起显示。

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DColor controls the display color of the message in the messaging system and map views.

颜色一栏控制信息在信息系统和地图视图里面显示的颜色。

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If no bootable drive is detected, it will display a message that the computer system needs a system disk.

如果没有检测到可以启动的驱动器，就会显示一条信息，表明计算机系统需要一个系统盘。

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