应用程序环境块相关代码

	// GetEnvironmentVariable
               //  获取path环境变量的值。
	LPTSTR pszValue = NULL;

	DWORD dwResult = GetEnvironmentVariable(_T("path"), pszValue, 0);
	if (dwResult != 0)
	{
		DWORD dwSize = dwResult * sizeof(TCHAR);
		pszValue = (LPTSTR)malloc(dwSize);
		ASSERT(pszValue);
		GetEnvironmentVariable(_T("path"), pszValue, dwSize);
		TRACE("path=%S.\n", pszValue);
		free(pszValue);
	}