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在文檔(C++示例)如何從WDM驅動程序的CreateInstance
LUnknown* pIUnknown = CreateInstance(slot);
得到的IUnknown我試試這個
>> import ctypes
>> print type(ctypes.cdll.lcomp.CreateInstance(0))
<type 'int'>
如何獲得IUnknown和的QueryInterface?