hi
Have container in your page as
<div id="wizard_container" runat="server"></div>
Then from the Page_Init event create and add the wizard.
protected void Page_Init(object sender, EventArgs e)
{
Wizard wizard1 = new Wizard();
TextBox text1 = new TextBox();
WizardStep step1 = new WizardStep();
step1.Controls.Add(text1);
step1.ID = "step3";
step1.Title = "Step 3";
TextBox text2 = new TextBox();
WizardStep step2 = new WizardStep();
step2.Controls.Add(text2);
step2.ID = "step4";
step2.Title = "Step 4";
wizard1.WizardSteps.Add(step1);
wizard1.WizardSteps.Add(step2);
wizard_container.Controls.Add(wizard1);
}