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 gtk_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