public delegate void IOCompletionCallback (
	bool succeeded,
	uint ntransmitted,
	Exception exception,
	Object context
)

Public Delegate Sub IOCompletionCallback ( _
	succeeded As Boolean, _
	ntransmitted As UInteger, _
	exception As Exception, _
	context As Object _
)

public delegate void IOCompletionCallback (
	bool succeeded, 
	unsigned int ntransmitted, 
	Exception^ exception, 
	Object^ context
)