That dialog is private to Outlook and cannot be customized.
As for displaying it, you can execute any toolbar or menu command with CommandBars techniques. See
http://www.outlookcode.com/d/tips/commandbarfun.htm
--
Sue Mosher, Outlook MVP
Author of
Microsoft Outlook Programming - Jumpstart for
Administrators, Power Users, and Developers
http://www.outlookcode.com/jumpstart.aspx
"mouspi" <(E-Mail Removed)> wrote in message news:(E-Mail Removed)...
> Hi,
>
> How can I add more controls (text box and check box) to customize the
> message 'Flag for Follow Up' dialog box ?
>
> Later, when I re-read this message, I'd like to see this dialog box opened
> immediately; any one knows how to do it ?
>
> Regards
>
> mouspi
>
>