Add support for changing passwords while dialing a connection

[jeff-winn]

The RasDialer class appears to be able to support changing passwords during a connection attempt if the connection is reattempted from a PasswordExpired state.

See the following for more information:
https://msdn.microsoft.com/en-us/library/windows/desktop/aa377238(v=vs.85).aspx

"Use szPassword to send a new password to the remote server when you restart a RasDial connection from a RASCS_PasswordExpired paused state."

[jeff-winn]

This may be a bit hard for me to work on alone, the VPN service I use to test the library may not support forced password changes on next login.

[jeff-winn]

This appears to be related to the paused states feature, which could also correspond to the PausedStates option on the dialer.

https://docs.microsoft.com/en-us/windows/desktop/rras/paused-states

[jeff-winn]

The new RasDialer component will support these paused states to offload to a C# ever handler.

However I do not have any means of testing this functionality, if you’d like to use it you will likely have to help me test it.

[NatLCal]

Not sure if you are still working on this issue, but if so let me know and I do my best to help.
I am looking for a solution to the same problem.