The RasHangUp function terminates a remote access connection. The connection is specified with a RAS connection handle. The function releases all RASAPI32.DLL resources associated with the handle.
// handle to the RAS connection to hang up
If the function succeeds, the return value is zero.
If the function fails, the return value is a nonzero error value listed in the RAS header file, or ERROR_INVALID_HANDLE.
The connection is terminated even if the RasDial call has not yet been completed.
After this call, the hrasconn handle can no longer be used.
An application should not call RasHangUp and then immediately exit. The connection state machine needs time to properly terminate. If the system prematurely terminates the state machine, the state machine may fail to properly close a port, leaving the port in an inconsistent state. A simple way to avoid this problem is to call Sleep(3000) after returning from RasHangUp; after that pause, the application can exit. A more responsive way to avoid the problem is, after returning from RasHangUp, to call RasGetConnectStatus(hrasconn) and Sleep(0) in a loop until RasGetConnectStatus returns ERROR_INVALID_HANDLE.
RASCONN, RasDial, RasEnumConnections, RasGetConnectStatus, Sleep
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