displaying a textboxes vs. listboxes depending on postback condition

[jason]

I have an asp.net (vb) page with a form. Under some circumstances I'd
like to
offer a textbox and in other a listbox in the same exact spot and
field width.

I'd like to do this without having two asp.net pages, and without
having to dynamically write out the form in my asp.net code.

Is there any other way to do this?

Thanks for any help or info.

[jason]

figured it out.

listbox1.visible = false