[求助]IRawPixels.Write方法

<H2>IRawPixels.Write方法</H2>
<DIV>IRawPixels.Write Method<BR>If transactioning is enabled, this write is persisted temporarily to a memory cache that allows undo support; otherwise, the data is persisted directly to disk at this time.<BR>If transactioning is enabled,是什么意思？怎么就能让它enable，我想调用这个方法后，结果在内存里暂时存在，但是我现在write完之后，都是永久保存，怎么样可以暂时保存？谢谢。</DIV>