# GdkAtom is an opaque typedef
GdkAtom
typedef struct _GdkAtom *GdkAtom;
GDK_WINDOWING_X11
#define GDK_WINDOWING_X11
GDK_WINDOWING_WIN32
#define GDK_WINDOWING_WIN32
GDK_WINDOWING_QUARTZ
#define GDK_WINDOWING_QUARTZ
GDK_WINDOWING_WAYLAND
#define GDK_WINDOWING_WAYLAND
GDK_DISABLE_DEPRECATION_WARNINGS
#define GDK_DISABLE_DEPRECATION_WARNINGS