Look-ahead assertions in search

Is it possible to do a "negative look-ahead assertion" in a search? If not,
does anyone know of any other tools that can open a Microsoft Office
document and do this kind of search?

What I want to find is a single capital letter that is not followed by two
spaces.

Phil Hibbs.
Don't you just hate self-referential sigs?

Here's a possible workaround:
o Search for double-space and replace with some character not used in your document - perhaps #.
o Search for [A-Z][^#] - with both "Match case" and "Regular expressions" ticked.

This will match the capitals you need, but also the following character. If you want to replace just the capital, search for [A-Z]([^#]) instead and append $1 to your replacement string.

In any case, replace # with double-space afterwards, of course.

I trust this helps.

Brian Barker