How to add object to script control in VB .NET 2008 Express

Hi

I am using Microsof Visual Basic .Net 2008 and Dot Net framework 3.5.

I'm using the following code.

Dim ScriptCntrl as New MSScriptControl.ScriptControlClass
Dim ObjTexbox as new TextBox
ObjTexbox.Name = "txtFirstName"

ScriptCntrl.AddObject(objTextBox.Name,objTextbox,true)


when I m executing the above code I'm getting following error

"Specified Cast is Not Valid"

What is the solution?

It works for me...after fixing the typos and setting a Language.  The name of the textbox wasn't consistent:

        Dim ScriptCntrl As New MSScriptControl.ScriptControlClass
        ScriptCntrl.Language = "VBScript"

        Dim ObjTextBox As New TextBox
        ObjTextBox.Name = "txtFirstName"

        ScriptCntrl.AddObject(ObjTextBox.Name, ObjTextBox, True)