There are plenty of third-party products which will do things like speak
aloud the selected text in a window. Search on "speak" and "selected text".
I seem to recall names like "text-a-loud" and "first byte" and "nextup".
I recall others that had you place the text on the clipboard and it would be
spoken.
Another route is to write a macro to do this. Windows comes with speech
capability built-in, so this won't cost you any money. See the topic of
SAPI (speech applications programming interface) for instructions on how to
do this, although I recall seeing many vba example programs.
hth,
Chip