Access Violation

 0: #define _WIN32_WINNT 0x500
 1: 
 2: #include <windows.h>
 3: #include <atlbase.h>
 4: #include <atlcom.h>
 5: 
 6: #import "msxml3.dll" raw_interfaces_only
 7: 
 8: void main()
 9: {
10:     CoInitializeEx(NULL, COINIT_MULTITHREADED);
11:     CComPtr<MSXML2::IXMLDOMDocument> doc;
12:     
13:     HRESULT hr;
14:     hr = doc.CoCreateInstance(__uuidof(MSXML2::DOMDocument30));
15:     if (SUCCEEDED(hr))
16:     {
17:         VARIANT_BOOL sucesso;
18:         hr=doc->load(CComVariant(L"c:\\Teste.xml"), &sucesso);
19:         if (SUCCEEDED(hr) && sucesso != VARIANT_FALSE)
20:         {
21:             CComPtr<MSXML2::IXMLDOMNode> item;
22:             hr = doc->selectSingleNode(CComBSTR(L"//a/b/c"), &item);
23:             if (SUCCEEDED(hr))
24:             {
25:                 // Faz alguma coisa com o nó apontado por 'item'.
26:             }
27:         }
28:     }
29:     
30:     CoUninitialize();
31: }