C++ Win32 Schedule Task Fails because of bad XML - c++

Question

I am fiddling with the Windows Task Scheduler & attempting to schedule a task to execute when I log in.
So I have copied & pasted the exact example code from MSDN on how to do this - http://msdn.microsoft.com/en-us/library/aa381911(v=VS.85).aspx - I have specified my user name & my password in the code example. When I run it I get the error "Failed to save task: 80041318"
Thanks to people in another question I made I now know this error means:
The task XML contains a value which is incorrectly formatted or out of range
Now I dont know what this means, what am I doing incorrectly in my code, especially when 99% is a direct copy of the example MSDN code?
Maybe I need to format my username & password correctly because they are BSTR or VARIANT's?
I will post only the changes I made to the code but to see the whole code go to http://msdn.microsoft.com/en-us/library/aa381911(v=VS.85).aspx:
hr = pLogonTrigger->put_UserId( _bstr_t( L"soribo" ) ); // soribo is my username
pLogonTrigger->Release(); // line 221
hr = pRootFolder->RegisterTaskDefinition( // line 289
_bstr_t( wszTaskName ),
pTask,
TASK_CREATE_OR_UPDATE,
_variant_t(L"soribo"), // put in my windows username again (I'm the admin)
_variant_t(L"XXXXXX"), // put in my user password & no its not really XXXXXX :P
TASK_LOGON_GROUP,
_variant_t(L""),
&pRegisteredTask);
I dont understand where XML comes in because this is C++ Win32 code?
EDIT: Showing pTask related code: note I didn't change any of this, so its the example code from MSDN
// Create the task builder object to create the task.
ITaskDefinition *pTask = NULL;
hr = pService->NewTask( 0, &pTask );
pService->Release(); // COM clean up. Pointer is no longer used.
if (FAILED(hr))
{
printf("Failed to create a task definition: %x", hr);
pRootFolder->Release();
CoUninitialize();
return 1;
}

Answer 1

I am not sure if this is the cause of your error, but looking at the documentation of ITaskFolder::RegisterTaskDefinition and your code:
hr = pRootFolder->RegisterTaskDefinition( // line 289
_bstr_t( wszTaskName ),
pTask,
TASK_CREATE_OR_UPDATE,
_variant_t(L"soribo"), // put in my windows username again (I'm the admin)
_variant_t(L"XXXXXX"), // put in my user password & no its not really XXXXXX :P
TASK_LOGON_GROUP,
_variant_t(L""),
&pRegisteredTask);
I see you are using TASK_LOGON_GROUP, but pass an username password. If you use TASK_LOGON_GROUP, you should probably use a name of a group (like L"Builtin\\Administrators" or L"S-1-5-32-545") and VT_NULL for the password.