Welcome to the forum.
I did a google search with Windows 7 speech recognition openoffice and it appears that Windows 7 speech recognition only works with Microsoft programs. For example see
Speech recognition not working with non-microsoft programs which says
I'm starting to use Windows 7's speech recognition program which is proving to be much better than the alternatives, especially Dragon.
However, I can't get it to work with non-microsoft programs. It won't work with Adobe products (Photoshop, Illustrator, iDesign), Open Office, or the Chrome browser. It will work with Wordpad, Expression Web, Live Writer, etc.
A later post says
Thanks for the reply, Jerry. I do wonder if the Microsoft-only use for Speech Recognition is intentional; MSFT has always had a talent for shooting itself in the foot.
getting the response:
Naw is just most other applications have failed to utilize the accessibility APIs built into Windows which the speech recognition uses. Almost all of Microsoft's applications make heavy use of the accessibility APIs thus they mostly work with speech recognition.
All I can therefore suggest is that you faithfully follow the steps outlined in Windows 7 Help and try it first with some Microsoft programs. I found two useful items:
1 Start > Help and Support > type speech. This gives (W7 Home Edition) six results and
4 Use the computer without the mouse or keyboard is the one you want.
2 Start > type speech into the search box. This brings up Windows Speech Recognition and the Wizard leads you through what to do.
Now try to use it with a Microsoft program like Notepad or Wordpad or Windows Live Mail (Start > All Programs > Accessories > Notepad (or Wordpad)). When you have it working, try it with OpenOffice.
I
think the application you want to dictate into does not know that you are using speech recognition - Windows 7 converts your speech into text, and Windows 7 then sends the text to the program as though you were using a keyboard.
You might like to both search, and perhaps post, on one of the Microsoft forums like
Windows 7 Forum or one of the independent forums like
Seven Forums.
A colleague used Dragon Naturally Speaking under Windows XP and found it to be very good - he hasn't tried it with W7.
Let us know how you get on.