How would I write a program to receive when a mission is successfully completed in Visual Basic 2005? I already got it so that it receives notification of when a mission is ended, but this is regardless of success or failure.Thanks!

There is an enum type (SIMCONNECT_MISSION_END) that is sent as a data param on the MissionCompleted notification. See the SIMCONNECT_MISSION_END enum description in the SDK docs for valid values (basically - failed, crashed, completed).