Windows has long supported metafiles, a special graphics format for storing drawing commands. I won't go into this topic further; if you are interested - please refer to the Wikipedia article linked.
But GDI also has one more "file-y" format, called "display file". The only reference to it, without any details about, is in the documentation for the GetDeviceCaps function:
TECHNOLOGY - Device technology. It can be any one of the following values.
