To achieve mechanical action known from LabVIEW as
Latch when released follow this procedure:
1. Create a custom user interface in VBAI.
2. Configure button to have mechanical action
Switch when pressed in the user interface.
3. Add
Update Inspection UI step after the step, where the value from the button is used.
4. Manually assign opposite value to the button. Value of button on user interface will return back to default value.
Example code, which shows this behavior is attached to this article.