problem creating a new widget

[Mathew Yeates <mathew yeates tv>]

Hi
This is on windows with gtk 2.4.13

I wanted to make a widget that is a variation on GtkSrolledWindow. After 
creating a library with my new widget in it, when I link to my library I 
get the error
unresolved external symbol __gtk_marshal_VOID__ENUM_BOOLEAN
unresolved external symbol __gtk_widget_get_aux_info
unresolved external symbol __gtk_range_get_wheel_delta

I've noticed that _gtk_range_get_wheel_delta is in gtkrange.c but isnt 
being exported by libgtk.
Any help??

MathewHi