Programmatically setting preshared key in Windows 2000

Hi,

From the MSDN, I'm using:

rasCredentials.dwSize = sizeof(RASCREDENTIALS);
rasCredentials.dwMask = RASCM_PreSharedKey;
strcpy(rasCredentials.szPassword, psk2.c_str());
DWORD res = RasSetCredentials(
NULL, // lpszPhonebook
dialParams.szEntryName, // lpszEntry
&rasCredentials, // lpCredentials
false // fClearCredentials
);

to set the pre-shared key value for a RAS VPN entry. This works fine on
Windows XP and Vista. However, in MSDN in mentions that RASCM_PreSharedKey
mask is ignored on Windows 2000.

How can I programmatically set the pre-shared key for a RAS VPN entry in
Windows 2000 (I'm using C++/Win32)?

--
Vanessa Deagan