ACTION
Action generated when the element is activated. Affects each element differently.
Callback
int function(Ihandle *ih); [in C] elem:action() -> (ret: number) [in Lua]
ih: identifier of the element that activated the event.
In some elements, this callback may receive more parameters, apart from ih. Please refer to each element's documentation.
Affects
IupButton, IupItem, IupList, IupText, IupCanvas, IupMultiline, IupToggle