The Handle property returns the handle to the current
dial-up networking connection, or a value of zero if the control has
not been used to establish a connection. Setting the value of this
property to a valid handle causes the control to inherit the
specified connection, and the control's properties will be updated
with information about that connection. This enables an application
to monitor and control a connection that was established by the user
or another program.
Setting the Handle property to a value of zero causes the
control to release the current connection, however it will not cause
the dial-up networking session to terminate. To disconnect from the
server, the Disconnect method must be called by the
application. Setting the property to a non-zero value which does not
specify a valid handle will generate an error.