How to delete SIMPLEBUTTON?

[Bugala]

I have been using
makebutton(100, #SIMPLEBUTTON)

by other words, made buttons by ids 100, 101, 102... to avoid them conflicting with existing ones.

However, when i do:
Removebutton(100)
removebutton(101)

these simple buttons still exist? How come?

[Bugala]

Found the problem already. I was using RemoveButton, while i should have been using DeleteButton.