Form control for contextual text field?

[Pupkin]

Hi,

Is there any kind of built-in control for a dropdownlist with a
contextual text field option?

For example:

Choose one:

This
That
Other
If the person selects, "Other" they are given a text field to enter the
value.

I know how to do this manually, but I'm new to .NET and wondered if
maybe there was some neat quick way to implement this through an
existing control.

Thanks.