Help needed: Auto Addition of Case Commands

[Warren Ang]

I'm new to VB6 so I'm wondering whether VB6 has the ability to add Case commands automatically. This is what I wish to do:

A form has 2 Textfields and 1 Button :
txtLower.Text = Lower Threshold of numbers
txtUpper.Text = Upper Threshold of numbers
cmdOk = Confirmation button

A user key in 2 numbers (lower threshold and upper threshold respectively). When he is done with the filling of the threshold, he will click cmdOk and I wish codes will carry out adding a new case command with respect to the threshold user keyed in . Can this be done?

Select case check
case txtLower.Text To txtUper.Text
.
.
.
.
and so on

Thanks for any advise, ideas, teachings and source codes.