For RightStr and LeftStr or middle. In .net, you use Substring method of string class. Below is the vb.net equivalent to the delphi code you post above which will give you the same output
If that what you want, take it. If not, ignored it and no complain
Dim s As String = "ABOUT DELPHI PROGRAMMING"
s = s.Substring(s.Length - 5)
Me.Text = s
kaymafIf that what you want, take it. If not, ignored it and no complain