Vista: OpenService() returns Access Denied

Our win32 app opens the Task Scheduler to enumerate tasks as follows:

SC_HANDLE hSC = NULL;
SC_HANDLE hSchSvc = NULL;

hSC = OpenSCManager(NULL, NULL, SC_MANAGER_CONNECT);
if (hSC == NULL) return GetLastError();
hSchSvc = OpenService(hSC, "Schedule", SERVICE_START |
SERVICE_QUERY_STATUS);

This works fine on current Windows platforms, but on Microsoft Vista the
OpenService fails and GetLastError() returns 5 ("Access Denied").

We get this even when the app is running under Admin context, and have also
tried setting the app's security privilege to SE_DEBUG_NAME.

Is this just a Vista BETA issue at this point, or is there a new security
mechanism in place that we need to program for (and if so, what changes do
we need to make)?

Thanks!

http://msdn.microsoft.com/windowsvis...e/default.aspx

Sections on Application Compatibility and Security, which explains the new
User Access Control.

--
Jane, not plain 64 bit enabled :-)
Batteries not included. Braincell on vacation ;-)
"Mark Findlay" <mfindlay@speakeasy.org> wrote in message
news:uF5JpRN4GHA.508@TK2MSFTNGP06.phx.gbl...
> Our win32 app opens the Task Scheduler to enumerate tasks as follows:
>
> SC_HANDLE hSC = NULL;
> SC_HANDLE hSchSvc = NULL;
>
> hSC = OpenSCManager(NULL, NULL, SC_MANAGER_CONNECT);
> if (hSC == NULL) return GetLastError();
> hSchSvc = OpenService(hSC, "Schedule", SERVICE_START |
> SERVICE_QUERY_STATUS);
>
> This works fine on current Windows platforms, but on Microsoft Vista the
> OpenService fails and GetLastError() returns 5 ("Access Denied").
>
> We get this even when the app is running under Admin context, and have
> also tried setting the app's security privilege to SE_DEBUG_NAME.
>
> Is this just a Vista BETA issue at this point, or is there a new security
> mechanism in place that we need to program for (and if so, what changes do
> we need to make)?
>
> Thanks!
>

Thanks Jane,

I've been through a good chunk of the site you referenced and it appears
that we're not in Kansas anymore It looks like I need to create an
Application Manifest and rebuild the app with this in order to enable the
admin privileges necessary to execute the OpenService() call. Also, it
appears that I need to rebuild with Visual Studio 7 (I am currently using
Visual Studio 6) in order to include the Application Manifest. Finally, I
will also need to digitally sign the application.

I am going to proceed along these lines. Meanwhile, am I on the right track
with this? Any other advice you would offer to a Vista novice at this point?

Thanks!
Mark

"Jane C" <jellybean@nospam.xjgarage.org> wrote in message
news:62484171-68FC-40A5-88B9-5C840FE8E6E2@microsoft.com...
> http://msdn.microsoft.com/windowsvis...e/default.aspx
>
> Sections on Application Compatibility and Security, which explains the new
> User Access Control.
>
> --
> Jane, not plain 64 bit enabled :-)
> Batteries not included. Braincell on vacation ;-)
> "Mark Findlay" <mfindlay@speakeasy.org> wrote in message
> news:uF5JpRN4GHA.508@TK2MSFTNGP06.phx.gbl...
>> Our win32 app opens the Task Scheduler to enumerate tasks as follows:
>>
>> SC_HANDLE hSC = NULL;
>> SC_HANDLE hSchSvc = NULL;
>>
>> hSC = OpenSCManager(NULL, NULL, SC_MANAGER_CONNECT);
>> if (hSC == NULL) return GetLastError();
>> hSchSvc = OpenService(hSC, "Schedule", SERVICE_START |
>> SERVICE_QUERY_STATUS);
>>
>> This works fine on current Windows platforms, but on Microsoft Vista the
>> OpenService fails and GetLastError() returns 5 ("Access Denied").
>>
>> We get this even when the app is running under Admin context, and have
>> also tried setting the app's security privilege to SE_DEBUG_NAME.
>>
>> Is this just a Vista BETA issue at this point, or is there a new security
>> mechanism in place that we need to program for (and if so, what changes
>> do we need to make)?
>>
>> Thanks!
>>
>