Is there a way to format the text of items in a listbox control?

[jihaes]

I'm using a listbox control to contain items for a combobox control i'm making (check screenshot) and I need a way to tell the user that they can set a default value for the combobox control. I was hoping that when they click on the "set default" button on a listbox item, that item can be formatted in a way like BOLD, UNDERLINE, italicized, etc.. is there a way that the item in a listbox can be text formatted? (I currently have a disabled textbox at the bottom that shows what the default text is but I want to remove that and show it in the listbox..)
thanks.