- c -
- CALENDAR_NO_MONTH_CHANGE : Gtk
- CALENDAR_SHOW_DAY_NAMES : Gtk
- CALENDAR_SHOW_DETAILS : Gtk
- CALENDAR_SHOW_HEADING : Gtk
- CALENDAR_SHOW_WEEK_NUMBERS : Gtk
- CALENDAR_WEEK_START_MONDAY : Gtk
- CAN_DEFAULT : Gtk
- CAN_FOCUS : Gtk
- CAP_BUTT : Gdk
- CAP_NOT_LAST : Gdk
- CAP_PROJECTING : Gdk
- CAP_ROUND : Gdk
- CELL_RENDERER_FOCUSED : Gtk
- CELL_RENDERER_INSENSITIVE : Gtk
- CELL_RENDERER_MODE_ACTIVATABLE : Gtk
- CELL_RENDERER_MODE_EDITABLE : Gtk
- CELL_RENDERER_MODE_INERT : Gtk
- CELL_RENDERER_PRELIT : Gtk
- CELL_RENDERER_SELECTED : Gtk
- CELL_RENDERER_SORTED : Gtk
- CENTER_PTR : Gdk
- CENTIMETERS : Gtk
- CIRCLE : Gdk
- CLEAR : Gdk
- CLIENT_EVENT : Gdk
- CLIP_BY_CHILDREN : Gdk
- CLOCK : Gdk
- COFFEE_MUG : Gdk
- COLORSPACE_RGB : Gdk
- COMPOSITE_CHILD : Gtk
- CONFIGURE : Gdk
- CONTROL_MASK : Gdk
- COPY : Gdk
- COPY_INVERT : Gdk
- CORNER_BOTTOM_LEFT : Gtk
- CORNER_BOTTOM_RIGHT : Gtk
- CORNER_TOP_LEFT : Gtk
- CORNER_TOP_RIGHT : Gtk
- CROSS : Gdk
- CROSS_REVERSE : Gdk
- CROSSHAIR : Gdk
- CURSOR_IS_PIXMAP : Gdk
- CURVE_TYPE_FREE : Gtk
- CURVE_TYPE_LINEAR : Gtk
- CURVE_TYPE_SPLINE : Gtk