Error Using LookupPrivilege Value(...)

[Liang Yitao]

I used DllImport() to load the function
LookupPrivilege Value() in advapi32.dll, and then called
it in my button click event. But the function always
returns false. I got the error code it left through
GetLastError() function and the result is "997" which
means, in the system error code in MSDN, "Overlapped I/O
operation is in progress." I don't know what's wrong with
it. The calling code is as below:
--------------------------------
OpenProcessToke n(NULL,
SE_SHUTDOWN_NAM E,
&Luid))
--------------------------------
Here SE_SHUTDOWN_NAM E is "SeShutdownPriv ilege", and the
type of Luid is long.

Please help me, and thanks a lot :)

[Bart Jacobs]

Liang,

Are you using the SetLastError property of the DllImport attribute, and
the System::Runtime ::InteropServic es::Marshall::G etLastWin32Erro r
method? Do not use GetLastError with P/Invoke.

Also: I assume you meant to write LookupPrivilege Value instead of
OpenProcessToke n?

Bart Jacobs

Liang Yitao wrote:

I used DllImport() to load the function
LookupPrivilege Value() in advapi32.dll, and then called
it in my button click event. But the function always
returns false. I got the error code it left through
GetLastError() function and the result is "997" which
means, in the system error code in MSDN, "Overlapped I/O
operation is in progress." I don't know what's wrong with
it. The calling code is as below:
--------------------------------
OpenProcessToke n(NULL,
SE_SHUTDOWN_NAM E,
&Luid))
--------------------------------
Here SE_SHUTDOWN_NAM E is "SeShutdownPriv ilege", and the
type of Luid is long.

Please help me, and thanks a lot :)

[Tomas Restrepo \(MVP\)]

Liang,

I used DllImport() to load the function
LookupPrivilege Value() in advapi32.dll, and then called
it in my button click event. But the function always
returns false. I got the error code it left through
GetLastError() function and the result is "997" which
means, in the system error code in MSDN, "Overlapped I/O
operation is in progress." I don't know what's wrong with
it. The calling code is as below:
--------------------------------
OpenProcessToke n(NULL,
SE_SHUTDOWN_NAM E,
&Luid))
--------------------------------
Here SE_SHUTDOWN_NAM E is "SeShutdownPriv ilege", and the
type of Luid is long.

If you're using DllImport instead of using IJW, then make sure you set the
SetLastError property of the DllImport attribute to true. You'd probably be
better off then calling Marshal.GetLast Win32Error() instead of
GetLastError().

--
Tomas Restrepo
to****@mvps.org

[Liang Yitao]

Oh, yes. I made a mistake ^_^
Thank you for your reply, and I'll try to do it in your
way.

-----Original Message-----
Liang,

Are you using the SetLastError property of the DllImport attribute, andthe System::Runtime ::InteropServic es::Marshall::G etLastWin32Er
rormethod? Do not use GetLastError with P/Invoke.

Also: I assume you meant to write LookupPrivilege Value instead ofOpenProcessTok en?

Bart Jacobs

Liang Yitao wrote:

I used DllImport() to load the function
LookupPrivilege Value() in advapi32.dll, and then called it in my button click event. But the function always
returns false. I got the error code it left through
GetLastError() function and the result is "997" which
means, in the system error code in MSDN, "Overlapped I/O operation is in progress." I don't know what's wrong with it. The calling code is as below:
--------------------------------
OpenProcessToke n(NULL,
SE_SHUTDOWN_NAM E,
&Luid))
--------------------------------
Here SE_SHUTDOWN_NAM E is "SeShutdownPriv ilege", and the type of Luid is long.

Please help me, and thanks a lot :)

.