This is a Computers & Programming video tutorial where you will learn how to make a simple port scanner in VB.Net. It detects all the open ports on your network. Open up a Form1 and you will have a ListBox1, a 'Start' and a 'Stop' button and a blank text box. There is also a Timer1 button at the bottom. Thereafter, the video shows the various parts of the code on the screen. Then click on Debugging, and click 'Start'. The system starts scanning ports starting with port 1. In the video it shows that most of the ports are closed. Click 'Stop'. Now say you want to start scanning from port 130. Simply type in 130 in the blank text box and click 'Start'. The scanner starts scanning from port 130. That's it. You now know how to scan your ports using VB.Net.