Inside Macintosh: Mac OS 8 Toolbox Reference /

Chapter 2 - Control Manager Reference / Control Manager Types and Constants

The Auxiliary Control Structure

NOT RECOMMENDED WITH THE APPEARANCE MANAGER

When the Appearance Manager is available and you are using standard controls, most of the fields of the auxiliary control structure are ignored except the acCTable and acFlags fields. If you are creating your own control definition function, the entire auxiliary control structure can be used.