Multipage Control

I have a user control embedded in a PageView of an IE Multipage control. My user control has a text box. I would like to change the text property of the text box. How do I access the text box properties? I am having no luck so far and nobody seems to know how to access the controls within an IE Multipage control.

Here is some information to use in your response...

I am building an ASP.Net web form.

form id="myForm"
multipage control id="myMP"
user control id="myControl"
textbox id="myText"

Thank you in advance.