DirectShow 下 BaseClasses 编译错误

[xxdelta]

D:\DXSDK\Samples\C++\DirectShow\BaseClasses\amextra.cpp(108) : error C2664: 'NotifyEvent' : cannot convert parameter 2 from 'long' to 'unsigned long *'
Conversion from integral type to pointer type requires reinterpret_cast, C-style cast or function-style cast
amfilter.cpp
D:\DXSDK\Samples\C++\DirectShow\BaseClasses\amfilter.cpp(770) : error C2511: 'NotifyEvent' : overloaded member function 'long (long,long,long)' not found in 'CBaseFilter'
.\amfilter.h(148) : see declaration of 'CBaseFilter'
D:\DXSDK\Samples\C++\DirectShow\BaseClasses\amfilter.cpp(2936) : error C2664: 'NotifyEvent' : cannot convert parameter 2 from 'long' to 'unsigned long *'
Conversion from integral type to pointer type requires reinterpret_cast, C-style cast or function-style cast


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都是这种类型错误，是什么原因呀？

[winstonch]

NotifyEvent的第二个参数的类型是LONG_PTR也就是'unsigned long *'
你调用的时候用的应该是 'long' 型的实参，所以会出这个错。

你没贴出代码不知道该怎样改。