通过关键系统文件判断正确的操作系统版本

typedef struct tagTRANSLATION
{
	WORD langID;            // language ID
	WORD charset;            // character set (code page)
} TRANSLATION;

#define  KeyFILENAMECHECK  "\\kernel32.dll"

DWORD GetVersionExFromFile(OSVERSIONINFOEX &osvi)
{
	BOOL bOsVersionInfoEx;
	TCHAR szSysDir[MAX_PATH] = {0};
	TCHAR szFileName[MAX_PATH+sizeof(KeyFILENAMECHECK)] = {0};

	TRANSLATION translation;

	DWORD dwDummyHandle;
	DWORD len = 0;
	BYTE *pVerBuf = NULL;
	LPVOID pInfoVal;
	unsigned int dwInfoValSize;
	char INFO[MAX_PATH] = {0};
	int iMajorVer, iMinorVer;

	ZeroMemory(&osvi, sizeof(OSVERSIONINFOEX));
	osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX);

	if ((bOsVersionInfoEx = GetVersionEx((OSVERSIONINFO*)&osvi)) == 0)
	{
		// If OSVERSIONINFOEX doesn't work, try OSVERSIONINFO.
		osvi.dwOSVersionInfoSize = sizeof (OSVERSIONINFO);

		if (!GetVersionEx((OSVERSIONINFO *)&osvi))
		{
			return FALSE;
		}
	}

	// 通过关键系统文件判断正确的操作系统版本
	GetSystemDirectory(szSysDir, MAX_PATH);
	_snprintf(szFileName, sizeof(szFileName) - 1, "%s%s", szSysDir, KeyFILENAMECHECK);

	//将版本信息资源读入缓冲区
	len = GetFileVersionInfoSize(szFileName, &dwDummyHandle);

	if (len > 0)
	{
		pVerBuf = (BYTE *)LocalAlloc(LHND, len);
	}

	if (pVerBuf
		&& GetFileVersionInfo(szFileName, 0, len, pVerBuf))
	{
		translation.langID = MAKELANGID(LANG_ENGLISH,SUBLANG_ENGLISH_US);

		if (VerQueryValue(pVerBuf,
			TEXT("\\VarFileInfo\\Translation"),
			&pInfoVal, &dwInfoValSize)
			&& dwInfoValSize >= 4)
		{
			translation = *(TRANSLATION*)pInfoVal;
		}

		_snprintf(INFO,
			sizeof(INFO) - 1,
			"\\StringFileInfo\\%04x%04x\\FileVersion",
			translation.langID,
			translation.charset);

		//获得具体的版本号
		VerQueryValue(pVerBuf, (LPSTR)INFO, &pInfoVal, &dwInfoValSize);

		iMajorVer = *((char*)pInfoVal) - '0';
		iMinorVer = *((char*)pInfoVal + 2) - '0';

		// 取文件版本成功则使用文件版本，此处也可判断是否运行在兼容模式下
		osvi.dwMajorVersion = iMajorVer;
		osvi.dwMinorVersion = iMinorVer;

	}

	if (pVerBuf)
	{
		memset(pVerBuf, 0, len);
		LocalFree(pVerBuf);
	}

	return TRUE;

}

int main()
{
	OSVERSIONINFOEX osvi;
	GetVersionExFromFile(osvi);

	return 0;
}