By default, when a part becomes visible, automatically the EnablePart is called. Use the EnablePart property to disable parts of the control. A disabled part can't be clicked, and shows the disabled state. Use the Background property to apply a visual effect on any part of the control. The EnableParts property is similar with the EnablePart property. Use the VisiblePart property to specify which parts are visible or hidden. The ClickPart or ClickingPart event is fired only if the user clicked in an enabled part.

By default, the following parts are enabled:

• exLowerBackPart ( the part between the start and the thumb part of the control )
• exThumbPart ( the thumb/slider part )
• exUpperBackPart ( the part between the thumb and end of the control )