Is there a wizard control in WPF?

WPF has a navigation infrastructure built in:

WPF Navigation Overview

Also check out the wizard sample

Another simple way I have used for a basic Wizard is to use multiple Grids and change the Visibility properties when the buttons are clicked, using an int to keep track of the 'step number'

    <Grid Name="Page1">
        <TextBlock>Page 1</TextBlock>
    </Grid>

    <Grid Name="Page2" Visibility="Hidden">
        <TextBlock>Page 2</TextBlock>
    </Grid>