Edit -> Insert Barcode
You need to know which code you are tryng to create (i.e. Code 128, Code 39, UPC(a), POSTNET, etc). The Barcode Wizard will walk you through, and is pretty self explanatory. Each of the questions are pretty straight forward. Assuming you know why you are making a Barcode, you should have most of the answers before you begin (i.e. coding, height width, if the code needs to scan 0, etc, etc).