set bold, cursive, underline and color in a text-box multiline()

Hello I have a form with text box, I set its “text type” property in “multi-line”
because I want to use this control, like “word”. This control is connected to a table field.
My problem is, that I need to use the bold, the cursive, the underline or to change color,
on a single word or sentence, but I did not find this kind of settings.
I found the frames object but I can’t connect it, with the db