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VB Forum / Win API / May 2007LogonUser API in NT4
Hi All, I have developed an VB6 application which utilize LogonUser API to authenticate the user when copying files from current server to another server. I have tested copied from XP Pro to NT4 workstation, it is working fine. But from NT4 workstation copied to XP Pro, failed. I used GetLastError to get the error codes, but it always return 0. Below is the function for checking the login If Len(d) = 0 Then d = vbNullString ' check the username/password pair ' using LOGON32_LOGON_NETWORK delivers the best performance ret = LogonUser(User, d, Pwd, 2, 3, hToken) ' a non-zero value means success If ret <> 0 Then CheckLogin = ImpersonateLoggedOnUser(hToken) Else Dim errcode As Integer errcode = GetLastError() MsgBox errcode End If Any advice is appreciated. Thanks.  SignatureRegards, Venedict > Hi All, > [quoted text clipped - 7 lines] > the > error codes, but it always return 0. It will from VB; check Err.LastDllError instead Thanks. will try it out. SignatureRegards, Venedict > > Hi All, > > [quoted text clipped - 9 lines] > > It will from VB; check Err.LastDllError instead Hi, Manage to get the error codes and display the text, but the error code is 87, invalid parameter. But the same code was use in XP environment and it is working fine. Any advice?? Thanks SignatureRegards, Venedict > Thanks. will try it out. > [quoted text clipped - 11 lines] > > > > It will from VB; check Err.LastDllError instead Venedict <Venedict@discussions.microsoft.com> schrieb im Beitrag <DE5FB8DC-0701-491C-8D8D-BA2EA65881C9@microsoft.com>... > If Len(d) = 0 Then d = vbNullString > ' check the username/password pair [quoted text clipped - 12 lines] > > Any advice is appreciated. Thanks. As far as I can see at the time of WinNT 4 for dwLogonProvider 0 = LOGON32_PROVIDER_DEFAULT was the only supported value. Your code has 3 = LOGON32_PROVIDER_WINNT50 which has been introduced with Win2K. I.e. you are passing an "invalid parameter" (87). BTW: Using constant names instead of values will help both you and others very much in finding errors in the code. Signature---------------------------------------------------------------------- THORSTEN ALBERS Universität Freiburg albers@ uni-freiburg.de ---------------------------------------------------------------------- In addition to Thorsten's resolution, not also that LOGON32_LOGON_NETWORK isn't a logon, despite its name. It's merely a password verifier. The resultant token cannot be used for copying files between servers. > Hi All, > [quoted text clipped - 26 lines] > > Any advice is appreciated. Thanks. |
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