Input from Keyboard and Bar Code Scanner

[Maii]

Hi,
Is there any way to distinguish input between keyboard and bar code scanner. I have developed a VB project that user want to give input using only Bar Code scanner and Keyboard input will be Lock. How can I do this?

Thanks
maii

 

[fredericofonseca]

Depends on the scanner.

Most of the scanners on the market will be connected to the keyboard, and on those it is normally impossible to do that.

On those the only way I can think is to time the interval that each char takes on the input, and if greater than xxx, then it is a manual input.

Regards

Frederico Fonseca
SysSoft Integrated Ltd

http://www.syssoft-int.com

 

[Maii]

thank you for Reply Frederico

 

[wombat22]

Another method, although not entirely fool proof is that you allow the scanners to send the start/stop characters of the bar code.
This isn't usually "seen" in the eye readable format, so when the user types the barcode it will be without the start/stop characters.
This is how I've set it up - enforcing a double blind entry if typed.
Hope this helps.......