Outlook 2007 AddIn Question: How to create a custom emailing button that has the "New Message to Contact" button's functionality and can auto import the email addresses into the Bcc section of New...

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C#

Visual-Studio

Outlook

Tools to use: Visual Studio 2010 in C# for Outlook 2007 AddIn

I like to select all contact items with the "Ctrl + A" command and click the "New Message To Contact" button to send emails.
(screenshot 01[^])

All of the selected contact items' email addresses would appear in the "To..." section of the New Message window.
Is it possible to create a custom button that has the same functionality as the "New Message To Contact" button does AND can auto-place all selected email addresses into the "Bcc..." section instead of the "To..." section?
(screenshot 02[^])