Hi,

I don't know which model you need, but you can use font of characters like this:
Qt Code: 
  1. QFont barCodeFont("c39hrp24dhtt", 40, QFont::Normal);
To copy to clipboard, switch view to plain text mode 
and use it to write a bar code like a text.

Try this link:
http://pt.fontstock.net/14747/c39hrp24dhtt.html