7.2.52 hdefine

(hdefine geometry|camera|window|appearance|image|transform|ntransform name value)

Sets the value of a handle of a given type.

            (hdefine  <type>  <name>  <value>)
     

is generally equivalent to

            (read <type>  { define <name> <value> })
     

except that the assignment is done when hdefine is executed, (possibly not at all if inside a conditional statement), while the read ... define performs assignment as soon as the text is read. See References. See (read ...). See (hdelete ...).