DISPFACE.CPP

/************************************************************************* 
** 
**  This is a part of the Microsoft Source Code Samples. 
** 
**  Copyright 1992 - 1998 Microsoft Corporation. All rights reserved. 
** 
**  This source code is only intended as a supplement to Microsoft Development 
**  Tools and/or WinHelp documentation.  See these sources for detailed 
**  information regarding the Microsoft samples programs. 
** 
**  OLE Automation TypeLibrary Browse Helper Sample 
** 
**  dispface.cpp 
** 
**  CDispinterface implementation 
** 
**  Written by Microsoft Product Support Services, Windows Developer Support 
** 
*************************************************************************/ 
 
#include <windows.h> 
#include <windowsx.h> 
#ifdef WIN16    
  #include <ole2.h> 
  #include <compobj.h>     
  #include <dispatch.h>  
  #include <variant.h> 
  #include <olenls.h>   
#endif  
#include "browseh.h"   
 
/* 
 * CDispinterface::Create 
 * 
 * Purpose: 
 *  Creates an instance of the Dispinterface automation object and initializes it. 
 * 
 * Parameters:        
 *  ptinfo             TypeInfo of dispinterface. 
 *  ppDispinterface    Returns Dispinterface automation object. 
 * 
 * Return Value: 
 *  HRESULT 
 * 
 */ 
HRESULT  
CDispinterface::Create(LPTYPEINFO ptinfo, CDispinterface FAR* FAR* ppDispinterface)  
{    
    HRESULT hr; 
    CDispinterface FAR* pDispinterface = NULL; 
      
    *ppDispinterface = NULL; 
     
    // Create object. 
    pDispinterface = new CDispinterface(); 
    if (pDispinterface == NULL) 
    { 
        hr = E_OUTOFMEMORY;  
        goto error; 
    }    
    // Load type information for the object from type library.  
    hr = pDispinterface->LoadTypeInfo(IID_IDispinterface); 
    if (FAILED(hr)) 
        goto error;   
     
    // Ask base class (CTypeInfo) to initialize.     
    hr = pDispinterface->_InitTypeInfo(ptinfo); 
    if (FAILED(hr)) 
        goto error; 
     
    ptinfo->AddRef(); 
    pDispinterface->m_ptinfo = ptinfo; 
 
#ifdef _DEBUG   
    lstrcpyn(pDispinterface->m_szClassName, TEXT("Dispinterface"), 100); 
#endif 
         
    *ppDispinterface = pDispinterface; 
    return NOERROR; 
     
error: 
    if (pDispinterface == NULL) return E_OUTOFMEMORY; 
    if (pDispinterface->m_ptinfo) pDispinterface->m_ptinfo->Release(); 
          
    // Set to NULL to prevent destructor from attempting to free again   
    pDispinterface->m_ptinfo = NULL; 
     
    delete pDispinterface; 
    return hr; 
} 
 
/* 
 * CDispinterface::CDispinterface 
 * 
 * Purpose: 
 *  Constructor for CDispinterface object. Initializes members to NULL. 
 * 
 */ 
CDispinterface::CDispinterface() 
{ 
    m_pdispProperties = NULL; 
    m_pdispMethods = NULL; 
m_pdispInterface = NULL; 
    m_ptinfo = NULL; 
} 
 
/* 
 * CDispinterface::~CDispinterface 
 * 
 * Purpose: 
 *  Destructor for CDispinterface object.  
 * 
 */ 
CDispinterface::~CDispinterface() 
{ 
    if (m_pdispProperties) m_pdispProperties->Release(); 
    if (m_pdispMethods) m_pdispMethods->Release(); 
if (m_pdispInterface) m_pdispInterface->Release(); 
    if (m_ptinfo) m_ptinfo->Release(); 
}   
 
STDMETHODIMP_(REFCLSID) 
CDispinterface::GetInterfaceID() 
{ 
    return IID_IDispinterface; 
} 
 
STDMETHODIMP_(ICollection FAR*) 
CDispinterface::get_Methods()     
{       
    HRESULT hr; 
    CFunction FAR* pFunction; 
    CCollection FAR* pCollection = NULL; 
    LPDISPATCH pdisp;   
    LPTYPEATTR ptypeattr = NULL; 
    unsigned short n; 
     
    if (m_pdispMethods == NULL) 
    { 
        hr = m_ptinfo->GetTypeAttr(&ptypeattr);  
        if (FAILED(hr)) 
            {RaiseException(IDS_Unexpected); return NULL;}    
        hr = CCollection::Create(ptypeattr->cFuncs, 0, &pCollection); 
        if (FAILED(hr)) 
            {RaiseException(IDS_Unexpected); goto error;}   
        // Enumerate methods and return a collection of these.     
        for (n=0; n<ptypeattr->cFuncs; n++) 
        {       
            hr = CFunction::Create(m_ptinfo, n, &pFunction);  
            if (FAILED(hr)) 
                {RaiseException(IDS_Unexpected); goto error;} 
            pFunction->QueryInterface(IID_IDispatch, (void FAR* FAR*)&pdisp); 
            pCollection->Add(pdisp);   
            pdisp->Release(); 
        } 
        pCollection->QueryInterface(IID_IDispatch, (void FAR* FAR*)&pdisp); 
        m_pdispMethods = pdisp;  
        m_ptinfo->ReleaseTypeAttr(ptypeattr); 
    } 
    m_pdispMethods->AddRef(); 
    return (ICollection FAR*)m_pdispMethods;      
     
error:     
    if (ptypeattr) m_ptinfo->ReleaseTypeAttr(ptypeattr);    
    if (pCollection) delete pCollection;   
    return NULL; 
}   
 
STDMETHODIMP_(ICollection FAR*) 
CDispinterface::get_Properties()      
{     
    HRESULT hr; 
    CProperty FAR* pProperty; 
    CCollection FAR* pCollection = NULL; 
    LPDISPATCH pdisp; 
    LPVARDESC pvardesc = NULL;    
    LPTYPEATTR ptypeattr = NULL; 
    unsigned short n; 
     
    if (m_pdispProperties == NULL) 
    {     
        hr = m_ptinfo->GetTypeAttr(&ptypeattr); 
        if (FAILED(hr)) 
            {RaiseException(IDS_Unexpected); return NULL;}        
        hr = CCollection::Create(ptypeattr->cVars, 0, &pCollection);   
        if (FAILED(hr)) 
            {RaiseException(IDS_Unexpected); goto error;}   
        // Enumerate properties and return a collection of these.    
        for (n=0; n<ptypeattr->cVars; n++) 
        {        
            hr = m_ptinfo->GetVarDesc(n, &pvardesc);    
            if (FAILED(hr)) 
                {RaiseException(IDS_Unexpected); goto error;}    
            hr = CProperty::Create(m_ptinfo, pvardesc, &pProperty); 
            if (FAILED(hr)) 
                {RaiseException(IDS_Unexpected); goto error;}     
            m_ptinfo->ReleaseVarDesc(pvardesc);  
            pvardesc = NULL; 
            pProperty->QueryInterface(IID_IDispatch, (void FAR* FAR*)&pdisp); 
            pCollection->Add(pdisp);    
            pdisp->Release(); 
        } 
        pCollection->QueryInterface(IID_IDispatch, (void FAR* FAR*)&pdisp); 
        m_pdispProperties = pdisp;     
        m_ptinfo->ReleaseTypeAttr(ptypeattr);  
    } 
    m_pdispProperties->AddRef(); 
    return (ICollection FAR*)m_pdispProperties; 
 
error:   
    if (ptypeattr) m_ptinfo->ReleaseTypeAttr(ptypeattr);    
    if (pCollection) delete pCollection;    
    if (pvardesc) m_ptinfo->ReleaseVarDesc(pvardesc);    
    return NULL; 
}    
 
STDMETHODIMP_(IInterface FAR*) 
CDispinterface::get_Interface()  
{  
HRESULT hr; 
CInterface FAR* pInterface = NULL; 
LPTYPEINFO ptinfoInterface = NULL; 
HREFTYPE hreftype; 
 
// Check if this dispinterface is part of a dual interface. 
// (A dual interface has an interface and a dispinterface.) 
if ((m_wTypeFlags & TYPEFLAG_FDUAL) == 0) 
        {RaiseException(IDS_NotDualInterface); return NULL;} 
    if(m_pdispInterface == NULL) 
    { 
// Get interface part of dual interface 
#ifdef WIN32 
        hr = m_ptinfo->GetRefTypeOfImplType(0xFFFFFFFF, &hreftype); 
#else 
        hr = m_ptinfo->GetRefTypeOfImplType(0xFFFF, &hreftype); 
#endif  
if (FAILED(hr)) 
            {RaiseException(IDS_Unexpected); return NULL;} 
hr = m_ptinfo->GetRefTypeInfo(hreftype, &ptinfoInterface); 
if (FAILED(hr)) 
            {RaiseException(IDS_Unexpected); return NULL;} 
hr = CInterface::Create(ptinfoInterface, &pInterface);  
        if (FAILED(hr)) 
            {RaiseException(IDS_Unexpected); goto error;} 
pInterface->QueryInterface(IID_IDispatch, (void FAR* FAR*)&m_pdispInterface); 
        ptinfoInterface->Release(); 
} 
m_pdispInterface->AddRef(); 
return (IInterface FAR*)m_pdispInterface; 
 
error: 
if (ptinfoInterface) ptinfoInterface->Release(); 
if (pInterface) delete pInterface; 
    return NULL; 
}