我想做什么:
编写一个侦听Office事件的应用程序。我想听听机器上打开的任何实例的事件。例如。如果我正在使用Word中的BeforeDocumentSave,那么只要主机上的任何Word实例保存文档,我就希望激活此方法的接收器。
另一个要求是我在没有MFC或ATL的情况下用C ++编写。
我做了什么:
我写了一个应该听Word事件的程序。请参阅下面的代码。
问题:
它不起作用 - 永远不会输入事件处理程序,尽管我打开一个单词应用程序并执行应该触发事件的操作。
我有一些具体问题,当然任何其他意见都非常受欢迎!
问题:
是否可以从我未启动的应用程序中侦听事件?在我发现的所有示例中,侦听应用程序启动它想要侦听的office应用程序。
在微软howto(http://support.microsoft.com/kb/183599/EN-US/)中,我发现了以下评论:
然而,大多数事件,如 Microsoft Excel的工作簿事件,做 不要以DISPID 1开头。就这样 在这种情况下,您必须明确修改 在MyEventSink.cpp中发送映射到 将DISPID与正确匹配 方法
如何修改调度图?
代码:
这是我项目的头文件,后跟C文件:
#ifndef _OFFICEEVENTHANDLER_H_
#define _OFFICEEVENTHANDLER_H_
// 000209FE-0000-0000-C000-000000000046
static const GUID IID_IApplicationEvents2 =
{0x000209FE,0x0000,0x0000, {0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x46}};
struct IApplicationEvents2 : public IDispatch // Pretty much copied from typelib
{
/*
* IDispatch methods
*/
STDMETHODIMP QueryInterface(REFIID riid, void ** ppvObj) = 0;
STDMETHODIMP_(ULONG) AddRef() = 0;
STDMETHODIMP_(ULONG) Release() = 0;
STDMETHODIMP GetTypeInfoCount(UINT *iTInfo) = 0;
STDMETHODIMP GetTypeInfo(UINT iTInfo, LCID lcid, ITypeInfo **ppTInfo) = 0;
STDMETHODIMP GetIDsOfNames(REFIID riid, OLECHAR **rgszNames,
UINT cNames, LCID lcid, DISPID *rgDispId) = 0;
STDMETHODIMP Invoke(DISPID dispIdMember, REFIID riid, LCID lcid,
WORD wFlags, DISPPARAMS* pDispParams,
VARIANT* pVarResult, EXCEPINFO* pExcepInfo,
UINT* puArgErr) = 0;
/*
* IApplicationEvents2 methods
*/
STDMETHODIMP Startup();
STDMETHODIMP Quit();
STDMETHODIMP DocumentChange();
};
class COfficeEventHandler : IApplicationEvents2
{
public:
DWORD m_dwEventCookie;
COfficeEventHandler
(
) :
m_cRef(1),
m_dwEventCookie(0)
{
}
STDMETHOD_(ULONG, AddRef)()
{
InterlockedIncrement(&m_cRef);
return m_cRef;
}
STDMETHOD_(ULONG, Release)()
{
InterlockedDecrement(&m_cRef);
if (m_cRef == 0)
{
delete this;
return 0;
}
return m_cRef;
}
STDMETHOD(QueryInterface)(REFIID riid, void ** ppvObj)
{
if (riid == IID_IUnknown){
*ppvObj = static_cast<IApplicationEvents2*>(this);
}
else if (riid == IID_IApplicationEvents2){
*ppvObj = static_cast<IApplicationEvents2*>(this);
}
else if (riid == IID_IDispatch){
*ppvObj = static_cast<IApplicationEvents2*>(this);
}
else
{
char clsidStr[256];
WCHAR wClsidStr[256];
char txt[512];
StringFromGUID2(riid, (LPOLESTR)&wClsidStr, 256);
// Convert down to ANSI
WideCharToMultiByte(CP_ACP, 0, wClsidStr, -1, clsidStr, 256, NULL, NULL);
sprintf_s(txt, 512, "riid is : %s: Unsupported Interface", clsidStr);
*ppvObj = NULL;
return E_NOINTERFACE;
}
static_cast<IUnknown*>(*ppvObj)->AddRef();
return S_OK;
}
STDMETHOD(GetTypeInfoCount)(UINT* pctinfo)
{
return E_NOTIMPL;
}
STDMETHOD(GetTypeInfo)(UINT itinfo, LCID lcid, ITypeInfo** pptinfo)
{
return E_NOTIMPL;
}
STDMETHOD(GetIDsOfNames)(REFIID riid, LPOLESTR* rgszNames, UINT cNames,
LCID lcid, DISPID* rgdispid)
{
return E_NOTIMPL;
}
STDMETHOD(Invoke)(DISPID dispidMember, REFIID riid,
LCID lcid, WORD wFlags, DISPPARAMS* pdispparams, VARIANT* pvarResult,
EXCEPINFO* pexcepinfo, UINT* puArgErr)
{
return E_NOTIMPL;
}
// IApplicationEvents2 methods
void Startup();
void Quit();
void DocumentChange();
protected:
LONG m_cRef;
};
#endif // _OFFICEEVENTHANDLER_H_
C档案:
#include <windows.h>
#include <stdio.h>
#include "OfficeEventHandler.h"
#include "OCIdl.h"
int main()
{
CLSID clsid; // CLSID of automation object
HRESULT hr;
LPUNKNOWN punk = NULL; // IUnknown of automation object
LPDISPATCH pdisp = NULL; // IDispatch of automation object
IConnectionPointContainer *pConnPntCont;
IConnectionPoint *pConnPoint;
IUnknown *iu;
IID id;
COfficeEventHandler *officeEventHandler = new COfficeEventHandler;
CoInitialize(NULL);
hr = CLSIDFromProgID(OLESTR("Word.Application"), &clsid);
hr = CoCreateInstance(clsid, NULL, CLSCTX_SERVER,
IID_IUnknown, (void FAR* FAR*)&punk);
hr = punk->QueryInterface(IID_IConnectionPointContainer, (void FAR* FAR*)&pConnPntCont);
// IID for ApplicationEvents2
hr = IIDFromString(L"{000209FE-0000-0000-C000-000000000046}",&id);
hr = pConnPntCont->FindConnectionPoint( id, &pConnPoint );
hr = officeEventHandler->QueryInterface( IID_IUnknown, (void FAR* FAR*)&iu);
hr = pConnPoint->Advise( iu, &officeEventHandler->m_dwEventCookie );
Sleep( 360000 );
hr = pConnPoint->Unadvise( officeEventHandler->m_dwEventCookie );
if (punk) punk->Release();
if (pdisp) pdisp->Release();
CoUninitialize();
return hr;
}
// IApplicationEvents2 methods
void COfficeEventHandler::Startup()
{
printf( "In Startup\n" );
}
void COfficeEventHandler::Quit()
{
printf( "In Quit\n" );
}
void COfficeEventHandler::DocumentChange()
{
printf( "In DocumentChnage\n" );
}
答案 0 :(得分:3)
您的首要问题是您不在主线程和that causes the events to never reach your sink object中运行消息循环。使用Windows消息调度从您的接收器对象的COM服务器调用,因此您必须运行消息循环而不是简单地调用Sleep()
,以便最终将传入事件分派到接收器对象。
答案 1 :(得分:3)
我在这里给出的代码中发现了两个问题:
以下是更正后的.cpp文件。在.h文件中,唯一的更正是将Invoke更改为声明而不是实现。
关于代码的两点说明:
GetActiveObject
或CoCreateInstance
。前者仅在事件触发应用程序已经运行时才起作用。后者创建了一个不可见的实例。对于Word,这很有效,可能是因为如果我打开另一个Word实例,它是同一个进程的一部分。我还没有检查如果我打开一个新流程会发生什么,如果事件仍然会被触发。希望这有帮助!
#include <windows.h>
#include <stdio.h>
#include "OfficeEventHandler.h"
#include "OCIdl.h"
int main()
{
CLSID clsid; // CLSID of automation object
HRESULT hr;
LPUNKNOWN punk = NULL; // IUnknown of automation object
LPDISPATCH pdisp = NULL; // IDispatch of automation object
IConnectionPointContainer *pConnPntCont;
IConnectionPoint *pConnPoint;
IUnknown *iu;
IID id;
COfficeEventHandler *officeEventHandler = new COfficeEventHandler;
CoInitialize(NULL);
hr = CLSIDFromProgID(OLESTR("Word.Application"), &clsid);
/* hr = GetActiveObject( clsid, NULL, &punk );
*/ hr = CoCreateInstance(clsid, NULL, CLSCTX_SERVER,
IID_IUnknown, (void FAR* FAR*)&punk);
hr = punk->QueryInterface(IID_IConnectionPointContainer, (void FAR* FAR*)&pConnPntCont);
// IID for ApplicationEvents2
hr = IIDFromString(L"{000209FE-0000-0000-C000-000000000046}",&id);
hr = pConnPntCont->FindConnectionPoint( id, &pConnPoint );
hr = officeEventHandler->QueryInterface( IID_IUnknown, (void FAR* FAR*)&iu);
hr = pConnPoint->Advise( iu, &officeEventHandler->m_dwEventCookie );
MSG msg;
BOOL bRet;
while( (bRet = GetMessage( &msg, NULL, 0, 0 )) != 0 )
{
if (bRet == -1)
{
// handle the error and possibly exit
}
else
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
if( msg.message == WM_QUERYENDSESSION || msg.message == WM_QUIT || msg.message == WM_DESTROY )
{
break;
}
}
hr = pConnPoint->Unadvise( officeEventHandler->m_dwEventCookie );
if (punk) punk->Release();
if (pdisp) pdisp->Release();
CoUninitialize();
return hr;
}
// IApplicationEvents2 methods
void COfficeEventHandler::Startup()
{
printf( "In Startup\n" );
}
void COfficeEventHandler::Quit()
{
printf( "In Quit\n" );
}
void COfficeEventHandler::DocumentChange()
{
printf( "In DocumentChnage\n" );
}
STDMETHODIMP COfficeEventHandler::Invoke(DISPID dispIdMember, REFIID riid,
LCID lcid, WORD wFlags, DISPPARAMS* pdispparams, VARIANT* pvarResult,
EXCEPINFO* pexcepinfo, UINT* puArgErr)
{
//Validate arguments
if ((riid != IID_NULL))
return E_INVALIDARG;
HRESULT hr = S_OK; // Initialize
/* To see what Word sends as dispid values */
static char myBuf[80];
memset( &myBuf, '\0', 80 );
sprintf_s( (char*)&myBuf, 80, " Dispid: %d :", dispIdMember );
switch(dispIdMember){
case 0x01: // Startup
Startup();
break;
case 0x02: // Quit
Quit();
break;
case 0x03: // DocumentChange
DocumentChange();
break;
}
return S_OK;
}