From Xojo Documentation
| This item has been deprecated since version 2019r2 and should no longer be used.
Please use Slider.TickMarkStyle as a replacement.
Adds tick marks to the Slider.
The values are:
The TickStyles enum has the following values:
If the value is None, then there are no Tick Marks. Setting TickStyle to TopLeft places tick marks above a horizontal Slider or to the left of a vertical Slider. Setting TickStyle to BottomRight places tick marks below or to the right of the Slider.
This example is in the Open event of the control. It sets the TickStyle to Bottom Right.