VBA Code to search for field codes with certain text before the Field code and to change style...

In text with field code I have " This Section { REF Sect_Stuff } applies to blah blah."

I wondered what code would be needed to find all the field codes in the doc with the word "Section" before it? "Section" not being part of the field code.

And how to change the style of a field code?

Thank You