public uint get_minor_version ()
Returns the minor version number of the GTK+ library.
(e.g. in GTK+ version 3.1.5 this is 1.)
This function is in the library, so it represents the GTK+ library your code is are running against. Contrast with the MINOR_VERSION macro, which represents the minor version of the GTK+ headers you have included when compiling your code.
the minor version number of the GTK+ library