how to add "fill in the blank" macros in Word 2011

Hey everyone,

I'm trying to make a cover letter in which I can fill in specific things without having to edit it manually (i.e. greeting, Company, date, etc.).

I know this is possible with macros but I've never done programming in Word. I'm using Word 2011 by the way.

Does anyone know how to do this? (the code)

Thank you.