HOW TO: Set the Mask Property and the Picture Property for an Office 2003 CommandBar Button
Microsoft Office XP introduces two new properties to the CommandBarButton object: the Mask and Picture properties. You can use these properties to place pictures on custom generated command bar controls. Interested in putting custom images into a button of a toolbar? Check out this HOWTO kb article for instructions on how to do it in Office 2003 with Visual Studio Tools for Office. This can also be done in Office XP with instructions in this HOW-To article.