[英]vs 2005 error LNK2001: unresolved external symbol (2)
"public: virtual long __stdcall PCI1761Event::GetTypeInfoCount(unsigned int *)" (?GetTypeInfoCount@PCI1761Event@@UAGJPAI@Z) “公共:虚拟长__stdcall PCI1761Event :: GetTypeInfoCount(unsigned int *)”(?GetTypeInfoCount @ PCI1761Event @@ UAGJPAI @ Z)
Code
码
class PCI1761Event : 类PCI1761Event:
public CComObjectRoot, 公共CComObjectRoot,
public _IAdvDIOEvents 公共_IAdvDIOEvents
{ {
public: 上市:
BEGIN_COM_MAP(PCI1761Event) BEGIN_COM_MAP(PCI1761事件)
COM_INTERFACE_ENTRY(_IAdvDIOEvents) COM_INTERFACE_ENTRY(_IAdvDIOEvents)
END_COM_MAP() END_COM_MAP()
PCI1761Event(void);<br>
HRESULT OnDiInterrupt (
long channel,
VARIANT * data,
long scanStart,
long scanCount );<br>
HRESULT OnDiStatusChange (
long port,
VARIANT * data,
long scanStart,
long scanCount );<br>
HRESULT OnDiPatternMatch (
long port,
VARIANT * data,
long scanStart,
long scanCount );<br>
HRESULT OnDeviceRemoved (
long DeviceNumber );
HRESULT STDMETHODCALLTYPE GetTypeInfoCount(
/* [out] */ UINT *pctinfo) ;<br>
HRESULT STDMETHODCALLTYPE GetTypeInfo(
/* [in] */ UINT iTInfo,
/* [in] */ LCID lcid,
/* [out] */ ITypeInfo **ppTInfo) ;
HRESULT STDMETHODCALLTYPE GetIDsOfNames(
/* [in] */ REFIID riid,
/* [size_is][in] */ LPOLESTR *rgszNames,
/* [in] */ UINT cNames,
/* [in] */ LCID lcid,
/* [size_is][out] */ DISPID *rgDispId) ;
/* [local] */ HRESULT STDMETHODCALLTYPE Invoke(
/* [in] */ DISPID dispIdMember,
/* [in] */ REFIID riid,
/* [in] */ LCID lcid,
/* [in] */ WORD wFlags,
/* [out][in] */ DISPPARAMS *pDispParams,
/* [out] */ VARIANT *pVarResult,
/* [out] */ EXCEPINFO *pExcepInfo,
/* [out] */ UINT *puArgErr) ;
public: ~PCI1761Event(void); 公共:〜PCI1761Event(void); };
};
Why???? 为什么????
Because _IAdvDIOEvents
inteface you are trying to implement is derived from IDispatch
and thus you have to implement IDispatch
methods on your class too. 因为您要实现的
_IAdvDIOEvents
接口是从IDispatch
派生的,所以您也必须在类上实现IDispatch
方法。 In ATL you typically inherit your class from IDispatchImpl<_IAdvDIOEvents, ...>
class to have the menthods implemented for you. 在ATL中,您通常从
IDispatchImpl<_IAdvDIOEvents, ...>
类继承您的类,以为您实现方法。
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