Procedure for dynamically using both glyph and regular fonts in single calc field

I'm sure this is super simple but I'm not sure how to consistently incorporate glyph fonts and regular fonts in the same calc field. In the past I've incorporate Winding arrows with a regular font like Helvetica, but I've been having problems incorporating other Wingding symbols.

For instance, when I try to include the darkened enclosed circle containing the number "1" from Wingdings 2, the calc field displays a circle with an "x" inside. When I look at the character code for Wingdings 2, the glyph I want is represented by the number 70 at the top and 5 on the side. The glyph that shows up is 50/5 respectively. 

I could just change the default text in the calc field on the layout to Wingdings 2 but that would just switch the problem over to the Helvetica text. I'm not sure if it matters that the glyph is first captured as a variable in a Let function, but I'm mentioning it just in case. I've been using the TextFont function as such:

TextFont("u"; "Wingdings 2).

I'm pretty sure this is all of function of my total ignorance of how to use glyphs so ANY help will be much appreciated!!!