public virtual bool BeforeRegionClear(
	RegionEvent ev
)

Public Overridable Function BeforeRegionClear ( 
	ev As RegionEvent
) As Boolean

public:
virtual bool BeforeRegionClear(
	RegionEvent^ ev
)

abstract BeforeRegionClear : 
        ev : RegionEvent -> bool 
override BeforeRegionClear : 
        ev : RegionEvent -> bool