Highlight every character not followed by a space

[macropod]

You could use Word's "Replace" feature but with what I came up both characters will be highlighted, not only the first. This probably could only be done with a macro.
Just to show what I mean. With a test file:
In the menu 'Replace' in field 'Find what' type:
([x0000-x007F]{2})
in field 'Replace with' type:
\1
then click 'More...' and check 'Use wildcards'
and below in section 'Replace' in the dropdown 'Format' click 'Highlighted' (if Highlighted doesn't show up use instead 'Character' and 'Color character Yellow').
That's all, now click button 'Replace All' to see the result.

That approach, though, will highlight the second character also - even if that character is followed by a space. It also won't work properly on strings of 3 or more characters.