You will need to write the project yourself however there is a lot of code out there to help you. Here are a couple of things I wrote 8 years ago that may assist... This article[^] deals with binary/int and other conversions too. This article[^] deals with a numeric text box - you can modify to only allow 0 and 1 if in binary mode. Dave Binging is like googling, it just feels dirtier. Please take your VB.NET out of our nice case sensitive forum. Astonish us. Be exceptional. (Pete O'Hanlon) BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)