RegGetValue VS RegQueryValueEx

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NT 6.0之前提供接口RegQueryValueEx
LONG RegQueryValueEx( HKEY hKey, LPCWSTR lpValueName, LPDWORD lpReserved, LPDWORD lpType, LPBYTE lpData, LPDWORD lpcbData );

NT 6.0之后提供接口RegGetValue
LONG WINAPI RegGetValue( __in HKEY hkey, __in_opt LPCTSTR lpSubKey, __in_opt LPCTSTR lpValue, __in_opt DWORD dwFlags, __out_opt LPDWORD pdwType, __out_opt PVOID pvData, __in_out_opt LPDWORD pcbData );
参数略有不同，RegQueryValueEx以为没有提供subkey所以一般需要结合RegOpenKeyEx配合使用：

#if  (_WIN32_WINNT == 0x0600)ret = RegGetValue(HKEY_LOCAL_MACHINE, _T("SOFTWARE\\WinRAR"),    _T("exe32"), RRF_RT_REG_SZ, &type, data, psize);#elseHKEY hKey;DWORD dwValue;ret = RegOpenKeyEx(HKEY_LOCAL_MACHINE,    _T("SOFTWARE\\WinRAR"), 0, KEY_QUERY_VALUE, &hKey);if (ERROR_SUCCESS != ret){    DLOGT(_T("error(%u): RegOpenKeyEx() failed."), ret);    return false;}ret = RegQueryValueEx(hKey, _T("exe32"), NULL, NULL, (LPBYTE)data, psize);if (ERROR_SUCCESS != ret){    DLOGT(_T("error(%u): RegQueryValueEx() failed."), ret);    return false;}RegCloseKey(hKey);#endif

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