Upper to lower case

Hello everyone,
I need to make a selective change of words from upper to lower case. That is, sometimes I need to have, say, “King” be capitalized, but other times not. So I do not want a global search and replace, I need only a find. Can anyone help me with this?

(for the 895th time, Skip sighs for the lost world of WordPerfect Reveal Codes)

As I understand it, regex is not available on the Windows platform (boo!).