Are you sure you want to change the format of the actual data with your calculation or do you just want to display the data with that format on a specific layout?
If you only need the specified format for display purposes, you do not need a calulation, you can format the field with formatting options applied ot the field on the layout. (And they can be conditional formats if that is needed.)
Textsize ( textstyleAdd ( Yourfield ; SmallCaps ) ; 14 )
is the calculation expression to take the text in Yourfield and style it with small caps and size it at 14.
Thanks that's exactly what I needed!!!!