_gtkAdjustementSets
_gtkAdjustementSets defines the mostly common setting of an Adjustments object.
Prototype : fun [ObjGtkAdjustment F F F] ObjGtkAdjustment
- ObjGtkAdjustment : an Adjustments object
- F : current value. If nil, the current value is kept.
- F : lower value. If nil, the current value is kept.
- F : upper value. If nil, the current value is kept.
- Return ObjGtkAdjustment : the same object or nil if an error occurs.