Microsoft Office 2000/Visual Basic Programmer's Guide   

Microsoft Outlook Command Bars

In Outlook, command bars are stored in the Outlook workspace in the Outcmd.dat file. If user profiles have been set up for multiple users, the Outcmd.dat file is stored in the C:\Windows\Profiles\UserName\Application Data\Microsoft\Outlook subfolder. If user profiles have not been set up, the Outcmd.dat file is stored in the C:\Windows\Application Data\Microsoft\Outlook subfolder.