The original Longhorn Transformation Pack came as software package by Windows X to give users a taste of the then newest OS prototype, Longhorn. This was the stepping-stone for Microsoft into the final version of the OS, and represented a middle ground between XP and Vista. It began to introduce features that are now present in Vista such as Desktop Composition Engine (DCE), Desktop Windows Manager (DWM) and the sidebar. The public interest in Longhorn catalyzed the creation of the transformation pack. Out of passion and out of interest for Longhorn, the transformation pack was created and released with great success. After the change of gears at Redmond to pursue Windows Vista, the transformation pack followed suit and renamed itself. The goal of the Vista Transformation Pack is to emulate the look, feel and features of Windows Vista with the highest fidelity possible. With each successive version, Vista Transformation Pack has strived to improve its library of authentic Windows Vista elements so that Windows XP users can also enjoy the new “wow” experience. Throughout the life of Vista Transformation Pack, it has garnered acclaim and recognition for being the best software package in the emulation field.