Using COM in UMDF Drivers

On WHDC Microsoft has posted A COM QuickStart for UMDF Developers. The document goes over some high-level COM details as they apply to use in the user-mode driver framework.

The COM run time is not used. Rather, the core COM programming model is used to make programming the drivers easier. It is naturally expected that C++ will be used to write the UMDF drivers, though C can be used at the expense of simplicity / convenience. Of course, if past experience is any indication reference counting will likely be a sore spot...