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/* Determine what's under window-relative pixel position (*X, *Y).
- Return the OBJECT (string or buffer) that's there.
+ Return the object (string or buffer) that's there.
Return in *POS the position in that object.
Adjust *X and *Y to character positions.
+ If an image is shown at the specified position, return
+ in *OBJECT its image-spec.
Return in *DX and *DY the pixel coordinates of the click,
- relative to the top left corner of OBJECT, or relative to
+ relative to the top left corner of object, or relative to
the top left corner of the character glyph at (*X, *Y)
- if OBJECT is nil.
+ if the object at (*X, *Y) is nil.
Return WIDTH and HEIGHT of the object at (*X, *Y), or zero
if the coordinates point to an empty area of the display. */