public abstract bool StartDTMFSignal(
	DtmfNamedEvents signal
)

Public MustOverride Function StartDTMFSignal ( 
	signal As DtmfNamedEvents
) As Boolean

public:
virtual bool StartDTMFSignal(
	DtmfNamedEvents signal
) abstract

abstract StartDTMFSignal : 
        signal : DtmfNamedEvents -> bool