Plotscripting: raising stats

How do I write a plotscript that adds a permanent +1 to a hero's stat?

I know about the Get Hero Stat and Set Hero Stat commands but I don't know how to Set Hero Stat to its current value +1.

This has to be done with plotscript (instead of using an attack) due to some specific reasons that are too hard to explain.

Any advice?

Set Hero Stat to "Get Hero Stat (whatever) +1"... Just make sure the "maximum stat" is triggered instead of "current stat".

An example script can be found here. It assumes that an item is calling the script, though a menu, NPC, or text box could also utilize it.

... I bet you figure this out before you read this.

If that doesn't help you, try this page.

Worked like a charm. Thanks to both of you.