Creates an image-set object.
The function make-general-image-set
creates an image-set object that refers to an image or a file containing an image.
id is a pathname or string identifying an image file, or a symbol previously registered with register-image-translation.
width and height are the dimensions of a single sub-image within the main image, and image-count specifies the number of sub-images in the image.
(example-edit-file "capi/choice/tree-view")
(example-edit-file "capi/choice/extended-selection-tree-view")
(example-edit-file "capi/elements/toolbar")
CAPI User Guide and Reference Manual (Macintosh version) - 3 Aug 2017