Wondered if I could print a upc-a in visual basic .net.
How do I convert the data into barcodes automatically when the digits are submitted?

It would be better for you to have a 3rd party upc barcode generator. You need to fetch the digits and input the digits as encoding data of the generator.

It would be better for you to have a 3rd party upc barcode generator. You need to fetch the digits and input the digits as encoding data of the generator.

Thanks, and I wondered if I need to input 11 or 12 digits of the upc-a. Will the barcode compute checksum automatically for me?

i searched

I used some of the barcode control for vb.net to create upc-a, I suggest you to choose the control with vb code details 
http://www.businessrefinery.com/products/barcode_net/barcodes/net-upc-a.html

This VB.NET UPC-A Barcode Generator Library may solve your problem. It also offers detailed steps for generating UPC-A barcode in VB.NET.I think it's very simple.

This VB.NET UPC-A Barcode Generator Library may solve your problem. It also offers detailed steps for generating UPC-A barcode in VB.NET.I think it's very simple.

n fact, there are many barcode scanners on the internet, you can just google "barcode scanner" and many results can be visible. i can give you some advices, the tool mentioned above is good ,that is on barcode , i have ever used it and i think it´s good to use. i found a new imaging sdk recently and it also can scan barcode in many formats, you can have a try.