From the top of my "acad.CUI"
<!--
Warning! Do not edit the contents of this file.
If you attempt to edit this file using an XML editor, you could lose customization and migration functionality.
If you need to change information in the customization file, use the Customize User Interface dialog box in the product.
To access the Customize User Interface dialog box, click the Tools menu > Customize > Interface, or enter CUI on the command line.
-->