Hi everyone, I am writing a simple text editor. I would like the ability to be able to right click on a text file in my system and "Open With" using my program. Here is what I have so far: Code: If Environment.GetCommandLineArgs() Is Nothing Then 'Make new file normally Else 'Open each file in Environment.GetCommandLineArgs() string array End If However, this yields in an error: Exception System.NullReferenceException was thrown in debuggee: Object reference not set to an instance of an object. Is this the best approach at doing this? I don't want to associate it with my program, just open it. I also noticed that in the Windows "Open With" list, my icon is there but my program name is blank. Is there a way to set this? Thanks for any help.