Hi,
You can set the Post Action to Terminate.
If you use the Custom Post Action then you can use an expression to make a True or False action, such as Step.Result.ButtonHit == 1 will set True if Button 1 is activated. If the True Action was then set to Terminate Execution, It would do just that, any other button pressed would continue to the next step.
Hope this helps
Regards
Ray Farmer
Regards
Ray Farmer