What is the difference between a WDM driver, a KMDF driver and a UMDF driver?
一个WDM驱动的区别是什么，一个KMDF驱动程序和驱动程序？
UMDF uses a reference-counting scheme to manage the lifetime of callback objects and framework objects.
UMDF使用引用计数方案来管理回调对象和框架对象的寿命。
The UMDF DDI-which includes both the objects that the framework provides and the callback objects that the driver implements-is exposed entirely through COM interfaces.
驱动程序使用接口指针，而不是对象指针来与框架对象交互。
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