gtk-paper-size-new-from-key-file (keyfile groupname)

keyfile -- the g-key-file instance to retrieve the paper size from
groupname -- a string with the name of the group in the key file to read, or nil to read the first group

A new gtk-paper-size instance with the restored paper size, or nil if an error occurred.

Reads a paper size from the group groupname in the key file keyfile.