How do I set the focus to a control in the wizard page by default when Next Button is clicked?

You can use WizardControl's Next event for this purpose. In the Next event, check for the selected page and set the focus to the control in that page.

Here is the code snippet:

C#

private void wizardControl1_Next(object sender, System.EventArgs e)
{
    if(this.wizardControl1.SelectedPage == this.wizardControlPage2)
    this.textBox1.Focus();
}

VB

Private Sub wizardControl1_Next(ByVal sender As Object, ByVal e As System.EventArgs) Handles wizardControl1.Next
   If Me.wizardControl1.SelectedPage Is Me.wizardControlPage2 Then
      Me.textBox1.Focus()
   End If
End Sub

Similarly, you can use Wizard Control's Back event to set focus to the control in a page when Back button is pressed.