i need to hide a button once the buttons action is completed when it flows to th

If you are NOT using SAIL form, save the button value into pv!ButtonAction at the output of the form.(Lets say your button value was "XXX"). Now when the flow is again directed to the form, conditionally show hide the desired button by configuring 'only show when' as pv!ButtonAction <> "XXX"

Hope it answers your question.

what if I am using SAIL? how do I hide a button in Sail. What component should i use