UACUtils.h

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#pragma once

#include "strsafe.h"

class CUACUtils
{
public:
        static bool isVistaOrLater() {
                OSVERSIONINFO osvi;

                ::ZeroMemory(&osvi, sizeof(OSVERSIONINFO));
                osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);

                GetVersionEx(&osvi);

                return (osvi.dwMajorVersion >= 6);
        }

        template <typename T>
        static HRESULT CreateElevatedInstance(REFCLSID classId,
                               T** object, HWND window = 0)
        {
                BIND_OPTS3 bindOptions;
                ::ZeroMemory(&bindOptions, sizeof (BIND_OPTS3));
                bindOptions.cbStruct = sizeof (BIND_OPTS3);
                bindOptions.hwnd = window;
                bindOptions.dwClassContext = CLSCTX_LOCAL_SERVER;

                WCHAR wszMonikerName[300];
                WCHAR wszCLSID[50];

                #define cntof(a) (sizeof(a)/sizeof(a[0]))

                ::StringFromGUID2(classId, wszCLSID,
                                                                         cntof(wszCLSID));

                HRESULT hr = ::StringCchPrintfW(wszMonikerName, cntof(wszMonikerName), L"Elevation:Administrator!new:%s", wszCLSID);
        
                if (FAILED(hr))
                {
                        return hr;
                }

                return ::CoGetObject(wszMonikerName,
                                                         &bindOptions,
                                                         __uuidof(T),
                                                         reinterpret_cast<void**>(object));
        }

        static void SetShieldIcon(const CButton& button, bool on=true);
};