One more question, how to monitor other existing button click event on ribbon?
and after i create my button and then click on my button, in my click button
produre, how could i do a click on other existing button such as sign button
or encrypt button?

Ken Slovak - [MVP - Outlook] wrote:
You would need to create two separate toolbars. There are no rows in
toolbars (CommandBar objects).

If this is for Inspector UI you really should be handling the ribbon instead
of creating button/toolbar UI if you discover at runtime that the code is
running under Outlook 2007.

I create a toolbar with 8 buttons, in outlook2007 it display in one row, it
is too long, how to set them in two rows, 4 buttons each row? which
property
or interface etc. And i don't want to make outlook2003 not work, in
outlook2003, 2003 seems all button is in one row, Thank you.

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