GTK+(Win32) Font

How does GTK+ (Win32) determine the font it should use for menus, buttons etc? Recently all my GTK+ programs have started using a small hard to read font, where they were before using a normal sized one, and I haven't been able to work out how to reset it. Thanks

GTK+(Win32) default font

How does GTK+ (Win32) determine the font it should use for menus, buttons etc? Recently all my GTK+ programs have started using a small hard to read font, where they were before using a normal sized one, and I haven't been able to work out how to reset it. Thanks