With VCE How do I make a one use button?

[Fastlex]

How do I make a one use teleporter per BLID? (poll room)

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[Electrk]

onActivate > Client > VCE_ifVariable > hasVoted == 1 [1 3]
onVariableTrue > Client > chatMessage > "You've already voted!"
onVariableFalse > Client > VCE_modVariable > hasVoted [Set] 1
onVariableFalse > Blah > voteStuff