How to do formatting in iup textbox?

[Matt Welland]

What is the equivalent to iup.user in the Chicken iup egg?

local tags = iup.user { selectionpos = "7:24", bgcolor = "255 128 64" }
text1.addformattag = tags

Or more generally, how to apply formatting to text in the textbox widget?

Thanks,

Matt

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It is hard to keep things simple. - Richard Branson.