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How to detect whether the COM Port has been occupied or not?

How to detect whether the COM Port has been occupied or not?

‎07-25-2006 04:00 AM

  I need to detect whether the COM Port has been occupied or not before I use it, but don't know how to do it?
 
 
Thanks!
Jacky
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Re: How to detect whether the COM Port has been occupied or not?

‎07-25-2006 04:04 AM

Couldn't you simply trap if an error occurs on opening? OpenCom and OpenComConfig should return -7 in this case (Cannot open port.).


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