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Thanks for the reply.

That would be one way to do this task.

However, one thing that I don't understand is why SerialPort.GetPortNames() will still show a COM that has been removed.

Hi,

I am developing an application where I have to determine if an USB Connector assigned to a COM Port has been pulled out.

The obvious approach which I tried was to detect the available COM...

Implement it as a list. If you maintain an Adjacency Matrix, you can never get rid of the redundant entries.

Thanks for the reply.

I forgot to mention in my earlier post that I am closing the Port just like the way you mentioned.

I even give it enough time to close, that is run a while loop to ensure...

Hi.

I have a simple VB 6.0 application that communicates over serial port. It consists only of a single Form.
If I close this application by clicking the Close(Cross button in corner box), the...