text: #import <Cocoa/Cocoa.h>
  
  // typedef void (*callback)(void);
  
  @interface SliderHandler : NSObject
  
  @property (assign) int goSliderID;
  -(void) sliderValueChanged:(id) sender;
  
  @end
  
  typedef void* SliderPtr;
  
  SliderPtr Slider_New(int goSliderID, int x, int y, int w, int h);
  void Slider_SetMaximumValue(SliderPtr sliderPtr, double val);
  void Slider_SetMinimumValue(SliderPtr sliderPtr, double val);
  void Slider_SetValue(SliderPtr sliderPtr, double val);
  void Slider_SetSliderType(SliderPtr sliderPtr, int sliderType);
  double Slider_Value(SliderPtr sliderPtr);