Here you can discuss all things Latin. Use this board to ask questions about grammar, discuss learning strategies, get help with a difficult passage of Latin, and more.
I learned of one way, which is a tad slow, but OK for just a few letters - run Start/Programs/Accessories/Character Map. This allows you access to letters with macrons.
A lot quicker and within Word: use Insert - Symbol and select your letter. You can also create shortcuts for the letters, if you want to use them often.
Though my reply is superfluous, I like talking, thus I shall:
Of only Phil's method of the two was I aware. And I can make more thoroughly substantiated his assertion that it is operose by mine of congruent nature.