iup[lua]中某些属性限定了"creation only"。
经测试，"creation only"在map前（map_cb前）即可（无需在如iup.dialog{}、iup.text{}调用时）。

local iup=require'iuplua'
local Method='before map'
--	and 'after map'
local Text=iup.text{
	map_cb=function(Text)
		if Method=='after map' then
			Text.BORDER='YES'
			Text.SPIN='YES'
		end
	end,
}
if Method=='before map' then
	Text.BORDER='YES'
	Text.SPIN='YES'
end
local Dialog=iup.dialog{
	SIZE='100x',
	Text,
	map_cb=function(Dialog)
		if Method=='after map' then
			Dialog.MINBOX='NO'
			Dialog.MAXBOX='NO'
		end
	end,
}
if Method=='before map' then
	Dialog.MINBOX='NO'
	Dialog.MAXBOX='NO'
end
iup.Show(Dialog)
iup.MainLoop()