RasSecurityDialogEnd function (rasshost.h)

The RasSecurityDialogEnd function is a third-party RAS security DLL entry point that the RAS server calls to terminate an authentication transaction.

Note  Windows Server 2008, Windows Server 2003, Windows 2000 Server, and Windows NT Server 4.0 currently provide RAS security host support for serial devices only. Other types of connections, such as Integrated Services Digital Network (ISDN) or virtual private network (VPN) connections, are not supported.


DWORD RasSecurityDialogEnd(
  [in] HPORT hPort


[in] hPort

Specifies the port handle that the RAS server passed to the security DLL in the RasSecurityDialogBegin call for this authentication transaction.

Return value

If the security DLL returns NO_ERROR, the RAS server does not terminate the authentication transaction. In this case, the security DLL must later call the RasSecurityDialogComplete function when it is ready to terminate.

If the security DLL returns a nonzero error code, the RAS server terminates the authentication transaction. In this case, the security DLL does not need to make another RasSecurityDialogComplete call. Return an error code defined in Winerror.h or Raserror.h, such as ERROR_PORT_DISCONNECTED.


When a security DLL has finished authenticating the remote user, it calls the RasSecurityDialogComplete function. The RAS server then performs a cleanup sequence that includes a call to the DLL's RasSecurityDialogEnd function. This gives the security DLL an opportunity to perform any necessary cleanup. To terminate the authentication transaction, RasSecurityDialogEnd must return a nonzero error code.

The RAS server may also call RasSecurityDialogEnd if it needs to abnormally terminate the authentication transaction before the security DLL calls RasSecurityDialogComplete. In this case, the security DLL should terminate the worker thread associated with the hPort port handle, and perform any other necessary cleanup. If RasSecurityDialogEnd returns a nonzero value, the security DLL does not need to call RasSecurityDialogComplete.

For both normal and abnormal termination, the RasSecurityDialogEnd function returns NO_ERROR to delay the termination. If it does so, it must later call RasSecurityDialogComplete when it is ready to terminate.


Minimum supported client Windows 2000 Professional [desktop apps only]
Minimum supported server Windows 2000 Server [desktop apps only]
Target Platform Windows
Header rasshost.h

See also

RAS Server Administration Functions



Remote Access Service (RAS) Overview