Updating Macro Buttons Using Macros
Dynamically Updating a Token's Macro Buttons
Some times you want to modify what a token's macro button from within a macro, this could be to visually represent a spell or power as having been used or even indicating that it is available for use.
A quick note on some of these examples, as of 1.3b48 it is only possible to have 2 levels deep of code: blocks, so some of the examples do things a little differently than you would if you could have multiple levels of code: blocks to avoid running into the problem. Also as of 1.3b48 there is no way to get the index of the button that has been pressed, this will be addressed in the not too distant future.
This tutorial is broken into several parts, although DnD4e is used to explain the concepts they are just as valid for any other system where you want to track if a skill has already been used or not.