




The function get-enclosing-rectangle returns four values, describing the rectangle which exactly encloses the input points.The 
points
 argument must be a (possibly empty) list of alternating 
x
 and 
y
 values. If no 
points
 are given the function returns the null (unspecified) rectangle, which is four nils.
CAPI User Guide and Reference Manual (Windows version) - 3 Aug 2017