How to Check the device is connected or not

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Hello Experts,

I have a Device of Bar code Scanning. When i m attaching it to computer then its port is not connection with that.

So i want to know that how to check the device is connected or not?

Thanks

Posted 3-Jun-11 0:27am

Anubhava Dimri

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OriginalGriff 3-Jun-11 6:38am

We need more information than that!
How does it connect physically? What happens when you plug it in? Does it have a driver? That sort of thing.
Use the "Improve question" widget to give us the info

Dave Kreskowiak 3-Jun-11 9:50am

Insufficient information. What kind of scanner is it? How does it connect to the computer? If nothing else, we'd need a make and model number to find out.

There are a variety of different ways to connect barcode scanners to PC's. Depending on the interface type, you may or may not be able to find out if it's attached.

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Vivek Krishnamurthy · Answer 1 · 2011-06-03T01:57:00

Solution 1

I think Windows Management Instrumentation (WMI) should be able to help. Take a look at the following link.

WMI - Win32_DeviceChangeEvent Class[^]

If you can register to this event prior to connecting you device, you should be able to get the notification if the device is connected or not.

Posted 3-Jun-11 1:57am

Vivek Krishnamurthy

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Dave Kreskowiak 3-Jun-11 9:48am

This will only work is the scanner is a USB device. It won't work if it's the more common keyboard wedge or for an IP-based scanners.