Diacriticals

I can't figure out how to make MS Word produce a macron. And I can't figure out how to get OpenOffice Writer to produce any of the diacriticals I need. But, if I make them here and then copy and paste them into Word or Writer, they work.

So...

Ä
ä
Ā
ā
Ë
ë
Ē
ē
Ï
ï
Ī
ī
ñ
Ö
ö
Ō
ō
Ü
ü
Ū
ū

what a kludge.