The ConnectSpeed property returns the speed, in bytes per
second, at which the current dial-up networking device has
established a connection. If the control is unable to determine the
connection speed, it will return a value of zero.
This property is only supported with applications running under
Windows 98, Windows NT 4.0 and later versions. A general purpose
application designed to run on all of the common Windows platforms
should expect that this property may return zero as a value.