How to set a file to be read only?

This is probably simple, but a quick search didn't produce anything.

How do I programmatically set a file to be read only?

I think this would do:

VB Code:

Dim fi As New FileInfo("C:\test.jpg")
        fi.Attributes = FileAttributes.ReadOnly Or fi.Attributes

didnt test it, but I think that's how it should be:D

Yep, I figured that out after I posted, but didn't have the time to come back and tell anyone. Thanks.