Serial Port Monitoring and Barcode readers

I am trying to write a piece of software for home product use.  I have a serial barcode reader and need to be able to read a general barcode in.
How would I instigate this as I dont know how I read from a barcode reader or how to have the serial port monitored to do this.
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mikelittlewoodAsked:
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intheCommented:
if you need components search "barcode" at www.delphipages.com and there are 9 or so comps to choose from plus some here..

http://www.torry.ru/vcl/misc/barcode.zip 
http://www.torry.ru/vcl/misc/barscan.zip 
http://www.torry.ru/vcl/misc/qrbc.zip 

there were some others but prices were a bit much.
Regards Barry
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mikelittlewoodAuthor Commented:
Thanks for the links, though I still need to try and get my head around the code as it is a lot more complicated than I am used to.

Mike
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