You will need to throw your own "tip" using the popup. Tooltips are not designed to work interactively as you request, but tooltips provide more control over the display.
, ( , ..)
<Button x:Name="bttnTarget" MouseEnter="bttnTarget_MouseEnter" Content="Click..!!" Height="23" HorizontalAlignment="Left" Margin="191,108,0,0" VerticalAlignment="Top" Width="75" />
<Popup x:Name="tooltip" PlacementTarget="{Binding ElementName=bttnTarget}" MouseLeave="bttnTarget_MouseLeave" Placement="Bottom">
<StackPanel>
<TextBlock>
<Hyperlink NavigateUri="http://stackoverflow.com/questions/">http://stackoverflow.com/questions/</Hyperlink>
</TextBlock>
</StackPanel>
</Popup>
. , .
private void bttnTarget_MouseLeave(object sender, MouseEventArgs e)
{
tooltip.IsOpen = false;
}
private void bttnTarget_MouseEnter(object sender, MouseEventArgs e)
{
tooltip.IsOpen = true;
}