Creates an image-locator object to use with toolbars, list views and tree views.
The function make-image-locator
creates an image-locator object for use with toolbars, list views, and tree views. It is used to specify a single sub-image from a larger image that contains many images side by side. It is also useful for accessing some images that can only be specified by means of image sets.
CAPI User Guide and Reference Manual (Macintosh version) - 3 Aug 2017