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Lingering COM Objects Caused by ActiveX Control Event Handlers

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14 Mar 20068 min read 45.9K   501   22  
This article describes how, under some circumstances, an ActiveX control event handler can cause COM objects to linger.
 

/* this ALWAYS GENERATED file contains the definitions for the interfaces */


 /* File created by MIDL compiler version 6.00.0366 */
/* at Mon Mar 13 18:54:05 2006
 */
/* Compiler settings for _InfoSource.idl:
    Oicf, W1, Zp8, env=Win32 (32b run)
    protocol : dce , ms_ext, c_ext, robust
    error checks: allocation ref bounds_check enum stub_data 
    VC __declspec() decoration level: 
         __declspec(uuid()), __declspec(selectany), __declspec(novtable)
         DECLSPEC_UUID(), MIDL_INTERFACE()
*/
//@@MIDL_FILE_HEADING(  )

#pragma warning( disable: 4049 )  /* more than 64k source lines */


/* verify that the <rpcndr.h> version is high enough to compile this file*/
#ifndef __REQUIRED_RPCNDR_H_VERSION__
#define __REQUIRED_RPCNDR_H_VERSION__ 475
#endif

#include "rpc.h"
#include "rpcndr.h"

#ifndef __RPCNDR_H_VERSION__
#error this stub requires an updated version of <rpcndr.h>
#endif // __RPCNDR_H_VERSION__

#ifndef COM_NO_WINDOWS_H
#include "windows.h"
#include "ole2.h"
#endif /*COM_NO_WINDOWS_H*/

#ifndef ___InfoSource_h__
#define ___InfoSource_h__

#if defined(_MSC_VER) && (_MSC_VER >= 1020)
#pragma once
#endif

/* Forward Declarations */ 

#ifndef __IDataInfo_FWD_DEFINED__
#define __IDataInfo_FWD_DEFINED__
typedef interface IDataInfo IDataInfo;
#endif 	/* __IDataInfo_FWD_DEFINED__ */


#ifndef __IDataViewer_FWD_DEFINED__
#define __IDataViewer_FWD_DEFINED__
typedef interface IDataViewer IDataViewer;
#endif 	/* __IDataViewer_FWD_DEFINED__ */


#ifndef __CDataInfo_FWD_DEFINED__
#define __CDataInfo_FWD_DEFINED__

#ifdef __cplusplus
typedef class CDataInfo CDataInfo;
#else
typedef struct CDataInfo CDataInfo;
#endif /* __cplusplus */

#endif 	/* __CDataInfo_FWD_DEFINED__ */


#ifndef ___IDataViewerEvents_FWD_DEFINED__
#define ___IDataViewerEvents_FWD_DEFINED__
typedef interface _IDataViewerEvents _IDataViewerEvents;
#endif 	/* ___IDataViewerEvents_FWD_DEFINED__ */


#ifndef __CDataViewer_FWD_DEFINED__
#define __CDataViewer_FWD_DEFINED__

#ifdef __cplusplus
typedef class CDataViewer CDataViewer;
#else
typedef struct CDataViewer CDataViewer;
#endif /* __cplusplus */

#endif 	/* __CDataViewer_FWD_DEFINED__ */


/* header files for imported files */
#include "prsht.h"
#include "mshtml.h"
#include "mshtmhst.h"
#include "exdisp.h"
#include "objsafe.h"

#ifdef __cplusplus
extern "C"{
#endif 

void * __RPC_USER MIDL_user_allocate(size_t);
void __RPC_USER MIDL_user_free( void * ); 

#ifndef __IDataInfo_INTERFACE_DEFINED__
#define __IDataInfo_INTERFACE_DEFINED__

/* interface IDataInfo */
/* [unique][helpstring][dual][uuid][object] */ 


EXTERN_C const IID IID_IDataInfo;

#if defined(__cplusplus) && !defined(CINTERFACE)
    
    MIDL_INTERFACE("7ABA04DC-3684-4FF2-A725-E19F17ACBF87")
    IDataInfo : public IDispatch
    {
    public:
        virtual /* [helpstring][id] */ HRESULT STDMETHODCALLTYPE Initialize( 
            /* [in] */ BSTR bstrFileName) = 0;
        
        virtual /* [helpstring][id][propget] */ HRESULT STDMETHODCALLTYPE get_DataContents( 
            /* [retval][out] */ BSTR *pVal) = 0;
        
        virtual /* [helpstring][id][propput] */ HRESULT STDMETHODCALLTYPE put_DataContents( 
            /* [in] */ BSTR newVal) = 0;
        
    };
    
#else 	/* C style interface */

    typedef struct IDataInfoVtbl
    {
        BEGIN_INTERFACE
        
        HRESULT ( STDMETHODCALLTYPE *QueryInterface )( 
            IDataInfo * This,
            /* [in] */ REFIID riid,
            /* [iid_is][out] */ void **ppvObject);
        
        ULONG ( STDMETHODCALLTYPE *AddRef )( 
            IDataInfo * This);
        
        ULONG ( STDMETHODCALLTYPE *Release )( 
            IDataInfo * This);
        
        HRESULT ( STDMETHODCALLTYPE *GetTypeInfoCount )( 
            IDataInfo * This,
            /* [out] */ UINT *pctinfo);
        
        HRESULT ( STDMETHODCALLTYPE *GetTypeInfo )( 
            IDataInfo * This,
            /* [in] */ UINT iTInfo,
            /* [in] */ LCID lcid,
            /* [out] */ ITypeInfo **ppTInfo);
        
        HRESULT ( STDMETHODCALLTYPE *GetIDsOfNames )( 
            IDataInfo * This,
            /* [in] */ REFIID riid,
            /* [size_is][in] */ LPOLESTR *rgszNames,
            /* [in] */ UINT cNames,
            /* [in] */ LCID lcid,
            /* [size_is][out] */ DISPID *rgDispId);
        
        /* [local] */ HRESULT ( STDMETHODCALLTYPE *Invoke )( 
            IDataInfo * This,
            /* [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);
        
        /* [helpstring][id] */ HRESULT ( STDMETHODCALLTYPE *Initialize )( 
            IDataInfo * This,
            /* [in] */ BSTR bstrFileName);
        
        /* [helpstring][id][propget] */ HRESULT ( STDMETHODCALLTYPE *get_DataContents )( 
            IDataInfo * This,
            /* [retval][out] */ BSTR *pVal);
        
        /* [helpstring][id][propput] */ HRESULT ( STDMETHODCALLTYPE *put_DataContents )( 
            IDataInfo * This,
            /* [in] */ BSTR newVal);
        
        END_INTERFACE
    } IDataInfoVtbl;

    interface IDataInfo
    {
        CONST_VTBL struct IDataInfoVtbl *lpVtbl;
    };

    

#ifdef COBJMACROS


#define IDataInfo_QueryInterface(This,riid,ppvObject)	\
    (This)->lpVtbl -> QueryInterface(This,riid,ppvObject)

#define IDataInfo_AddRef(This)	\
    (This)->lpVtbl -> AddRef(This)

#define IDataInfo_Release(This)	\
    (This)->lpVtbl -> Release(This)


#define IDataInfo_GetTypeInfoCount(This,pctinfo)	\
    (This)->lpVtbl -> GetTypeInfoCount(This,pctinfo)

#define IDataInfo_GetTypeInfo(This,iTInfo,lcid,ppTInfo)	\
    (This)->lpVtbl -> GetTypeInfo(This,iTInfo,lcid,ppTInfo)

#define IDataInfo_GetIDsOfNames(This,riid,rgszNames,cNames,lcid,rgDispId)	\
    (This)->lpVtbl -> GetIDsOfNames(This,riid,rgszNames,cNames,lcid,rgDispId)

#define IDataInfo_Invoke(This,dispIdMember,riid,lcid,wFlags,pDispParams,pVarResult,pExcepInfo,puArgErr)	\
    (This)->lpVtbl -> Invoke(This,dispIdMember,riid,lcid,wFlags,pDispParams,pVarResult,pExcepInfo,puArgErr)


#define IDataInfo_Initialize(This,bstrFileName)	\
    (This)->lpVtbl -> Initialize(This,bstrFileName)

#define IDataInfo_get_DataContents(This,pVal)	\
    (This)->lpVtbl -> get_DataContents(This,pVal)

#define IDataInfo_put_DataContents(This,newVal)	\
    (This)->lpVtbl -> put_DataContents(This,newVal)

#endif /* COBJMACROS */


#endif 	/* C style interface */



/* [helpstring][id] */ HRESULT STDMETHODCALLTYPE IDataInfo_Initialize_Proxy( 
    IDataInfo * This,
    /* [in] */ BSTR bstrFileName);


void __RPC_STUB IDataInfo_Initialize_Stub(
    IRpcStubBuffer *This,
    IRpcChannelBuffer *_pRpcChannelBuffer,
    PRPC_MESSAGE _pRpcMessage,
    DWORD *_pdwStubPhase);


/* [helpstring][id][propget] */ HRESULT STDMETHODCALLTYPE IDataInfo_get_DataContents_Proxy( 
    IDataInfo * This,
    /* [retval][out] */ BSTR *pVal);


void __RPC_STUB IDataInfo_get_DataContents_Stub(
    IRpcStubBuffer *This,
    IRpcChannelBuffer *_pRpcChannelBuffer,
    PRPC_MESSAGE _pRpcMessage,
    DWORD *_pdwStubPhase);


/* [helpstring][id][propput] */ HRESULT STDMETHODCALLTYPE IDataInfo_put_DataContents_Proxy( 
    IDataInfo * This,
    /* [in] */ BSTR newVal);


void __RPC_STUB IDataInfo_put_DataContents_Stub(
    IRpcStubBuffer *This,
    IRpcChannelBuffer *_pRpcChannelBuffer,
    PRPC_MESSAGE _pRpcMessage,
    DWORD *_pdwStubPhase);



#endif 	/* __IDataInfo_INTERFACE_DEFINED__ */


#ifndef __IDataViewer_INTERFACE_DEFINED__
#define __IDataViewer_INTERFACE_DEFINED__

/* interface IDataViewer */
/* [unique][helpstring][dual][uuid][object] */ 


EXTERN_C const IID IID_IDataViewer;

#if defined(__cplusplus) && !defined(CINTERFACE)
    
    MIDL_INTERFACE("57FE0CB5-7B2E-4A95-977F-CA8837CB16C3")
    IDataViewer : public IDispatch
    {
    public:
        virtual /* [helpstring][id][propget] */ HRESULT STDMETHODCALLTYPE get_DataInfo( 
            /* [retval][out] */ IDispatch **pVal) = 0;
        
        virtual /* [helpstring][id][propput] */ HRESULT STDMETHODCALLTYPE put_DataInfo( 
            /* [in] */ IDispatch *newVal) = 0;
        
        virtual /* [helpstring][id] */ HRESULT STDMETHODCALLTYPE CloseViewer( void) = 0;
        
        virtual /* [helpstring][id] */ HRESULT STDMETHODCALLTYPE OpenViewer( 
            /* [in] */ BSTR fileName) = 0;
        
    };
    
#else 	/* C style interface */

    typedef struct IDataViewerVtbl
    {
        BEGIN_INTERFACE
        
        HRESULT ( STDMETHODCALLTYPE *QueryInterface )( 
            IDataViewer * This,
            /* [in] */ REFIID riid,
            /* [iid_is][out] */ void **ppvObject);
        
        ULONG ( STDMETHODCALLTYPE *AddRef )( 
            IDataViewer * This);
        
        ULONG ( STDMETHODCALLTYPE *Release )( 
            IDataViewer * This);
        
        HRESULT ( STDMETHODCALLTYPE *GetTypeInfoCount )( 
            IDataViewer * This,
            /* [out] */ UINT *pctinfo);
        
        HRESULT ( STDMETHODCALLTYPE *GetTypeInfo )( 
            IDataViewer * This,
            /* [in] */ UINT iTInfo,
            /* [in] */ LCID lcid,
            /* [out] */ ITypeInfo **ppTInfo);
        
        HRESULT ( STDMETHODCALLTYPE *GetIDsOfNames )( 
            IDataViewer * This,
            /* [in] */ REFIID riid,
            /* [size_is][in] */ LPOLESTR *rgszNames,
            /* [in] */ UINT cNames,
            /* [in] */ LCID lcid,
            /* [size_is][out] */ DISPID *rgDispId);
        
        /* [local] */ HRESULT ( STDMETHODCALLTYPE *Invoke )( 
            IDataViewer * This,
            /* [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);
        
        /* [helpstring][id][propget] */ HRESULT ( STDMETHODCALLTYPE *get_DataInfo )( 
            IDataViewer * This,
            /* [retval][out] */ IDispatch **pVal);
        
        /* [helpstring][id][propput] */ HRESULT ( STDMETHODCALLTYPE *put_DataInfo )( 
            IDataViewer * This,
            /* [in] */ IDispatch *newVal);
        
        /* [helpstring][id] */ HRESULT ( STDMETHODCALLTYPE *CloseViewer )( 
            IDataViewer * This);
        
        /* [helpstring][id] */ HRESULT ( STDMETHODCALLTYPE *OpenViewer )( 
            IDataViewer * This,
            /* [in] */ BSTR fileName);
        
        END_INTERFACE
    } IDataViewerVtbl;

    interface IDataViewer
    {
        CONST_VTBL struct IDataViewerVtbl *lpVtbl;
    };

    

#ifdef COBJMACROS


#define IDataViewer_QueryInterface(This,riid,ppvObject)	\
    (This)->lpVtbl -> QueryInterface(This,riid,ppvObject)

#define IDataViewer_AddRef(This)	\
    (This)->lpVtbl -> AddRef(This)

#define IDataViewer_Release(This)	\
    (This)->lpVtbl -> Release(This)


#define IDataViewer_GetTypeInfoCount(This,pctinfo)	\
    (This)->lpVtbl -> GetTypeInfoCount(This,pctinfo)

#define IDataViewer_GetTypeInfo(This,iTInfo,lcid,ppTInfo)	\
    (This)->lpVtbl -> GetTypeInfo(This,iTInfo,lcid,ppTInfo)

#define IDataViewer_GetIDsOfNames(This,riid,rgszNames,cNames,lcid,rgDispId)	\
    (This)->lpVtbl -> GetIDsOfNames(This,riid,rgszNames,cNames,lcid,rgDispId)

#define IDataViewer_Invoke(This,dispIdMember,riid,lcid,wFlags,pDispParams,pVarResult,pExcepInfo,puArgErr)	\
    (This)->lpVtbl -> Invoke(This,dispIdMember,riid,lcid,wFlags,pDispParams,pVarResult,pExcepInfo,puArgErr)


#define IDataViewer_get_DataInfo(This,pVal)	\
    (This)->lpVtbl -> get_DataInfo(This,pVal)

#define IDataViewer_put_DataInfo(This,newVal)	\
    (This)->lpVtbl -> put_DataInfo(This,newVal)

#define IDataViewer_CloseViewer(This)	\
    (This)->lpVtbl -> CloseViewer(This)

#define IDataViewer_OpenViewer(This,fileName)	\
    (This)->lpVtbl -> OpenViewer(This,fileName)

#endif /* COBJMACROS */


#endif 	/* C style interface */



/* [helpstring][id][propget] */ HRESULT STDMETHODCALLTYPE IDataViewer_get_DataInfo_Proxy( 
    IDataViewer * This,
    /* [retval][out] */ IDispatch **pVal);


void __RPC_STUB IDataViewer_get_DataInfo_Stub(
    IRpcStubBuffer *This,
    IRpcChannelBuffer *_pRpcChannelBuffer,
    PRPC_MESSAGE _pRpcMessage,
    DWORD *_pdwStubPhase);


/* [helpstring][id][propput] */ HRESULT STDMETHODCALLTYPE IDataViewer_put_DataInfo_Proxy( 
    IDataViewer * This,
    /* [in] */ IDispatch *newVal);


void __RPC_STUB IDataViewer_put_DataInfo_Stub(
    IRpcStubBuffer *This,
    IRpcChannelBuffer *_pRpcChannelBuffer,
    PRPC_MESSAGE _pRpcMessage,
    DWORD *_pdwStubPhase);


/* [helpstring][id] */ HRESULT STDMETHODCALLTYPE IDataViewer_CloseViewer_Proxy( 
    IDataViewer * This);


void __RPC_STUB IDataViewer_CloseViewer_Stub(
    IRpcStubBuffer *This,
    IRpcChannelBuffer *_pRpcChannelBuffer,
    PRPC_MESSAGE _pRpcMessage,
    DWORD *_pdwStubPhase);


/* [helpstring][id] */ HRESULT STDMETHODCALLTYPE IDataViewer_OpenViewer_Proxy( 
    IDataViewer * This,
    /* [in] */ BSTR fileName);


void __RPC_STUB IDataViewer_OpenViewer_Stub(
    IRpcStubBuffer *This,
    IRpcChannelBuffer *_pRpcChannelBuffer,
    PRPC_MESSAGE _pRpcMessage,
    DWORD *_pdwStubPhase);



#endif 	/* __IDataViewer_INTERFACE_DEFINED__ */



#ifndef __InfoSource_LIBRARY_DEFINED__
#define __InfoSource_LIBRARY_DEFINED__

/* library InfoSource */
/* [helpstring][uuid][version] */ 


EXTERN_C const IID LIBID_InfoSource;

EXTERN_C const CLSID CLSID_CDataInfo;

#ifdef __cplusplus

class DECLSPEC_UUID("D7BF7BD9-C764-4173-8679-0BAB5A097075")
CDataInfo;
#endif

#ifndef ___IDataViewerEvents_DISPINTERFACE_DEFINED__
#define ___IDataViewerEvents_DISPINTERFACE_DEFINED__

/* dispinterface _IDataViewerEvents */
/* [helpstring][uuid] */ 


EXTERN_C const IID DIID__IDataViewerEvents;

#if defined(__cplusplus) && !defined(CINTERFACE)

    MIDL_INTERFACE("4E7D62B5-07F4-45F9-BB4E-41DFA1DE7D04")
    _IDataViewerEvents : public IDispatch
    {
    };
    
#else 	/* C style interface */

    typedef struct _IDataViewerEventsVtbl
    {
        BEGIN_INTERFACE
        
        HRESULT ( STDMETHODCALLTYPE *QueryInterface )( 
            _IDataViewerEvents * This,
            /* [in] */ REFIID riid,
            /* [iid_is][out] */ void **ppvObject);
        
        ULONG ( STDMETHODCALLTYPE *AddRef )( 
            _IDataViewerEvents * This);
        
        ULONG ( STDMETHODCALLTYPE *Release )( 
            _IDataViewerEvents * This);
        
        HRESULT ( STDMETHODCALLTYPE *GetTypeInfoCount )( 
            _IDataViewerEvents * This,
            /* [out] */ UINT *pctinfo);
        
        HRESULT ( STDMETHODCALLTYPE *GetTypeInfo )( 
            _IDataViewerEvents * This,
            /* [in] */ UINT iTInfo,
            /* [in] */ LCID lcid,
            /* [out] */ ITypeInfo **ppTInfo);
        
        HRESULT ( STDMETHODCALLTYPE *GetIDsOfNames )( 
            _IDataViewerEvents * This,
            /* [in] */ REFIID riid,
            /* [size_is][in] */ LPOLESTR *rgszNames,
            /* [in] */ UINT cNames,
            /* [in] */ LCID lcid,
            /* [size_is][out] */ DISPID *rgDispId);
        
        /* [local] */ HRESULT ( STDMETHODCALLTYPE *Invoke )( 
            _IDataViewerEvents * This,
            /* [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);
        
        END_INTERFACE
    } _IDataViewerEventsVtbl;

    interface _IDataViewerEvents
    {
        CONST_VTBL struct _IDataViewerEventsVtbl *lpVtbl;
    };

    

#ifdef COBJMACROS


#define _IDataViewerEvents_QueryInterface(This,riid,ppvObject)	\
    (This)->lpVtbl -> QueryInterface(This,riid,ppvObject)

#define _IDataViewerEvents_AddRef(This)	\
    (This)->lpVtbl -> AddRef(This)

#define _IDataViewerEvents_Release(This)	\
    (This)->lpVtbl -> Release(This)


#define _IDataViewerEvents_GetTypeInfoCount(This,pctinfo)	\
    (This)->lpVtbl -> GetTypeInfoCount(This,pctinfo)

#define _IDataViewerEvents_GetTypeInfo(This,iTInfo,lcid,ppTInfo)	\
    (This)->lpVtbl -> GetTypeInfo(This,iTInfo,lcid,ppTInfo)

#define _IDataViewerEvents_GetIDsOfNames(This,riid,rgszNames,cNames,lcid,rgDispId)	\
    (This)->lpVtbl -> GetIDsOfNames(This,riid,rgszNames,cNames,lcid,rgDispId)

#define _IDataViewerEvents_Invoke(This,dispIdMember,riid,lcid,wFlags,pDispParams,pVarResult,pExcepInfo,puArgErr)	\
    (This)->lpVtbl -> Invoke(This,dispIdMember,riid,lcid,wFlags,pDispParams,pVarResult,pExcepInfo,puArgErr)

#endif /* COBJMACROS */


#endif 	/* C style interface */


#endif 	/* ___IDataViewerEvents_DISPINTERFACE_DEFINED__ */


EXTERN_C const CLSID CLSID_CDataViewer;

#ifdef __cplusplus

class DECLSPEC_UUID("688EB11A-B9C7-4DB2-82A8-B5412E8F71D5")
CDataViewer;
#endif
#endif /* __InfoSource_LIBRARY_DEFINED__ */

/* Additional Prototypes for ALL interfaces */

unsigned long             __RPC_USER  BSTR_UserSize(     unsigned long *, unsigned long            , BSTR * ); 
unsigned char * __RPC_USER  BSTR_UserMarshal(  unsigned long *, unsigned char *, BSTR * ); 
unsigned char * __RPC_USER  BSTR_UserUnmarshal(unsigned long *, unsigned char *, BSTR * ); 
void                      __RPC_USER  BSTR_UserFree(     unsigned long *, BSTR * ); 

/* end of Additional Prototypes */

#ifdef __cplusplus
}
#endif

#endif

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Written By
Andrew Wirger
Software Developer (Senior)
United States United States
This member has not yet provided a Biography. Assume it's interesting and varied, and probably something to do with programming.

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Layout: fixed | fluid

Posted 14 Mar 2006

Article Copyright 2006 by Andrew Wirger
Everything else Copyright © CodeProject, 1999-2024

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