Getting animated expansion effect to my GUI in .NET 2.0

I have one GUI in .NET 2.0

based on user giving all the required initial inputs, I would like to expand in an animated fashion the GUI to take advanced inputs.

Pl Guide me to achieve this.

My code is in VB.NET 2005

any code snippets will be helpful

Create intermediate forms and open/close them in a timed sequence

Thank you Mur! any code snippet would be greatly helpful.