Outlook 2003: Want to access commandbar in "New message" window

[Steffen Grellmann]

Hi Newsgroup,

I want to add a button to the commandbar that shows up by default in
Outlook 2003 if Word is used as editor. To clarify which commandbar I
mean, it contains buttons for "Send-Attachment-Addressbook-and so on".

In general I know how to add custom defined commandbars and buttons to
Outlook and Word (2003) by an AddIn using VSTO 2005 SE.

My main question is: How can I access this commandbar for adding a
button to it? I could not find this commandbar neither in Word nor in
Outlook even not using OutlookSpy.

Any help would be highly appreciated.

Kind regards,

Steffen