gdk:toplevel-size-set-min-size (size width height)

size -- a gdk:toplevel-size instance
width -- an integer with the minimum width
height -- an integer with the minimum height

The minimum size corresponds to the limitations the toplevel can be shrunk to, without resulting in incorrect painting. A user of a gdk:toplevel object should calculate these given both the existing size, and the bounds retrieved from the gdk:toplevel-size object.

The minimum size should be within the bounds. see the gdk:toplevel-size-bounds function.