RasSetCredentials

The RasSetCredentials function sets the user credentials associated with a specified RAS phone-book entry.

DWORD RasSetCredentials(
  LPCTSTR lpszPhonebook,   // pointer to the full path and file name
                           //  of a phone-book file
  LPCTSTR lpszEntry,       // pointer to the name of a phone-book
                           //  entry
  LPRASCREDENTIALS lpCredentials, 
                           // pointer to structure that specifies the
                           //  credentials
  BOOL fClearCredentials   // if true, credentials are cleared
                           //  if false, credentials are set
);

Parameters

lpszPhonebook

Pointer to a null-terminated string that specifies the full path and file name of a phone-book (PBK) file. If this parameter is NULL, the function uses the current default phone-book file. The default phone-book file is the one selected by the user in the User Preferences property sheet of the Dial-Up Networking dialog box.

lpszEntry

Pointer to a null-terminated string that contains the name of a phone-book entry.

lpCredentials

Pointer to a RASCREDENTIALS structure that specifies the user credentials to set for the specified phone-book entry. Before calling RasSetCredentials, set the dwSize member of the structure to sizeof(RASCREDENTIALS). Set the dwMask member to indicate the credential information to be set.

fClearCredentials

Specifies a flag that indicates whether RasSetCredentials clears existing credentials by setting them to the empty string, "". If this flag is TRUE, the dwMask member of the RASCREDENTIALS structure indicates the credentials that the function sets to the empty string. If this flag is FALSE, the function sets the indicated credentials according to the contents of their corresponding RASCREDENTIALS members.

Return Values

If the function succeeds, the return value is zero.

If the function fails, the return value is one of the following error codes.

Remarks

The RasSetCredentials function sets the user credentials associated with a specified RAS phone-book entry. The credentials stored with a phone-book entry are the credentials of the last user to successfully connect using the specified phone-book entry, or the credentials subsequently specified in a call to the RasSetCredentials or RasSetEntryDialParams function for the phone-book entry.

The RasSetCredentials function is the preferred way of securely storing credentials with a phone-book entry. RasSetCredentials supersedes the RasSetEntryDialParams function, which may not be supported in future releases of Windows 2000.

Windows 2000 and later versions: If the szPassword member of the RASCREDENTIALS structure contains the password handle returned by RasGetCredentials or RasGetEntryDialParams, RasSetCredentials returns successfully without changing any currently saved password.

The following code sample sets the credentials for the phone-book entry with the name "mazy".

ZeroMemory(&lpCred, sizeof(lpCred));
 
lpCred.dwSize = sizeof(lpCred);
lstrcpy(lpCred.szUserName, "test");
lstrcpy(lpCred.szPassword, "");
lstrcpy(lpCred.szDomain, "BANANA40");
lpCred.dwMask=RASCM_UserName | RASCM_Password | RASCM_Domain ;
 
res=RasSetCredentials(NULL, "mazy", &lpCred, 0);
if(res == 0)
    printf("Set Credentials to:\n%s\n%s\n%s\n\n",
      lpCred.szUserName,lpCred.szPassword,lpCred.szDomain);
else
    printf("Error: %u\n\n,",res);

Requirements

  Windows NT/2000: Requires Windows NT 4.0 or later.
  Windows 95/98: Unsupported.
  Header: Declared in Ras.h.
  Library: Use Rasapi32.lib.
  Unicode: Implemented as Unicode and ANSI versions on Windows NT/2000.

See Also

Remote Access Service (RAS) Overview, Remote Access Service Functions, RASCREDENTIALS, RasGetCredentials, RasSetEntryDialParams