Speech recognition features are not available in the 2007 Microsoft Office system programs.
To use speech recognition features, run Windows Speech Recognition in Windows Vista. For information, see the links in the See Also section.
If your operating system is Microsoft Windows XP, you must run a previous version of a Microsoft Office system program to use speech recognition features.
In Microsoft Office Excel 2007, you can use text-to-speech functionality, which is different from speech recognition. To use text-to-speech commands, see I can't convert text to speech, which includes the information.