The function make-icon-resource-image-set
constructs an image set object that identifies an image stored as a icon resource in a DLL on Microsoft Windows.
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.
library should be a string specifying the name of the DLL.
id should be either an integer which is the resource identifier of the icon, or a string naming the icon resource.
CAPI User Guide and Reference Manual (Macintosh version) - 3 Aug 2017