int ConferenceCall(
	string activeCallId,
	string heldCallId,
	string deviceId
)

Function ConferenceCall ( _
	activeCallId As String, _
	heldCallId As String, _
	deviceId As String _
) As Integer

int ConferenceCall(
	String^ activeCallId, 
	String^ heldCallId, 
	String^ deviceId
)