Including Another Control Panel Definition in a Monitors Extension File
A control panel file that contains an extension to the Monitors control panel
can also contain a definition for an other, separate control panel. You might
want to include both an extension to the Monitors control panel and a new
control panel definition in the same file, for example, if each controlled some
features of the same video card. Any control panel definition must include a
'cdev' resource and the other resources described in the
Because the control panel resources and the Monitors extension resources in
the file have different resource ID numbers, the Finder handles them
separately. If the user opens a control panel file containing both a control
panel definition and an extension to the Monitors control panel, the control
panel defined in that file appears on the screen and the Finder ignores the
Monitors extension in that file. If the user opens the Monitors control panel
file, then the Monitors cdev function searches the other control panel files in the same folder for extensions and ignores any 'cdev' resources it finds in
those files. The user cannot open a control panel file that contains only an
extension to the Monitors control panel; such a file can be opened only by the