Does the RTB in .NET have methods equivalent to the VB6 RTB's .Span & .UpTo methods?

I'm trying to convert various VB6 routines to VB.NET and I managed to figure out some of the name changes, e.g. SelLength => SelectionLength,
but I can't find anything that looks like Span or UpTo.

Thanks, DaveBo

We need a "dazed & confused" icon.