If you want to use Word as your email editor in Outlook, then Word and
Outlook must be the same version (2000, 2002, or 2003), and you can only
have one version of Outlook installed on your computer. If Word and
Outlook are the same version, then:
Close Outlook and Word. Locate your OLE32.DLL file. The default
location for this file is C:\Windows\System32. Click on Start | Run.
In the "Open" box, type:
regsvr32 c:\windows\system32\ole32.dll
If necessary, replace "c:\windows\system32" with the actual path to the
ole32.dll file on your computer. You only have to run this command once
(not every time you start the computer). Exit. Restart Windows. Do
you still get the error message?