GetLastError() returning 5 on CreateFile

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I am calling CreateFile() form a remote system(using COM). It's giving INVALID_HANDLE_VALUE.

I have checked the error code using GetLastError(), it giving 5.
Can anybody tell what is the problem??

The same code running ok in local mode :(( .

Posted 19-Jan-11 3:01am

Debojyoti Majumder

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3 solutions

Solution 3

Many thanks.
I am using this code to set the security parameter like this..

VB

CoSetProxyBlanket(pReptGen,    // pointer to enumerator
                RPC_C_AUTHN_WINNT,        // authentication service
                RPC_C_AUTHZ_NONE,         // authorization service
                NULL,                         // server principle name
                RPC_C_AUTHN_LEVEL_CALL,   // authentication level
                RPC_C_IMP_LEVEL_IMPERSONATE,    // impersonation level
                NULL,                         // identity of the client
                EOAC_NONE);               // capability flags

Here pReptGen is my object which I have created using CoCreateInstance.
Is it ok now??

Posted 19-Jan-11 20:00pm

Debojyoti Majumder

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#realJSOP · Accepted Answer · 2011-01-19T03:07:00

Solution 1

That error is "Access denied".

http://msdn.microsoft.com/en-us/library/ms681381(v=vs.85).aspx[^]

Posted 19-Jan-11 3:07am

#realJSOP

Comments

Sergey Alexandrovich Kryukov 19-Jan-11 9:12am

Nothing else to say - a 5.
I can imagine further questions... let's see...

Nish Nishant · Accepted Answer · 2011-01-19T03:17:00

Solution 2

Adding to JSOP's answer.

The fact that it runs fine in your local machine does not mean it will run remotely via COM. You may need to configure the DCOM server to run as a higher privileged user. Alternatively, try writing to a path where you have permissions.

Posted 19-Jan-11 3:17am

Nish Nishant

Comments

Espen Harlinn 19-Jan-11 9:36am

5+ Good point about DCOM, not obvious to the unwary