MODULE.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 
** 
**  module.cpp 
** 
**  CModule 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"   
 
/* 
 * CModule::Create 
 * 
 * Purpose: 
 *  Creates an instance of the Module automation object and initializes it. 
 * 
 * Parameters:        
 *  ptinfo      TypeInfo of module. 
 *  ppModule    Returns Module automation object. 
 * 
 * Return Value: 
 *  HRESULT 
 * 
 */ 
HRESULT  
CModule::Create(LPTYPEINFO ptinfo, CModule FAR* FAR* ppModule)  
{    
    HRESULT hr; 
    CModule FAR* pModule = NULL; 
      
    *ppModule = NULL; 
     
    // Create object. 
    pModule = new CModule(); 
    if (pModule == NULL) 
    { 
        hr = E_OUTOFMEMORY;  
        goto error; 
    }     
    // Load type information for the object from type library.  
    hr = pModule->LoadTypeInfo(IID_IModule); 
    if (FAILED(hr)) 
        goto error; 
    // Intialize base class, CTypeInfo 
    hr = pModule->_InitTypeInfo(ptinfo); 
    if (FAILED(hr)) 
        goto error; 
     
    ptinfo->AddRef(); 
    pModule->m_ptinfo = ptinfo; 
 
#ifdef _DEBUG   
    lstrcpyn(pModule->m_szClassName, TEXT("Module"), 100); 
#endif  
         
    *ppModule = pModule; 
    return NOERROR; 
     
error: 
    if (pModule == NULL) return E_OUTOFMEMORY; 
    if (pModule->m_ptinfo) pModule->m_ptinfo->Release(); 
          
    // Set to NULL to prevent destructor from attempting to free again   
    pModule->m_ptinfo = NULL; 
     
    delete pModule; 
    return hr; 
} 
 
/* 
 * CModule::CModule 
 * 
 * Purpose: 
 *  Constructor for CModule object. Initializes members to NULL. 
 * 
 */ 
CModule::CModule() 
{  
    m_pdispFunctions = NULL; 
    m_ptinfo = NULL; 
} 
 
/* 
 * CModule::~CModule 
 * 
 * Purpose: 
 *  Destructor for CModule object.  
 * 
 */ 
CModule::~CModule() 
{ 
    if (m_pdispFunctions) m_pdispFunctions->Release();    
    if (m_ptinfo) m_ptinfo->Release(); 
}  
 
STDMETHODIMP_(REFCLSID) 
CModule::GetInterfaceID() 
{ 
    return IID_IModule; 
} 
 
STDMETHODIMP_(ICollection FAR*) 
CModule::get_Functions()      
{   
    HRESULT hr; 
    CFunction FAR* pFunction; 
    CCollection FAR* pCollection = NULL; 
    LPDISPATCH pdisp; 
    LPTYPEATTR ptypeattr = NULL; 
    unsigned short n; 
     
    if (m_pdispFunctions == NULL) 
    {    
        // Create collection of functions of the interface. 
        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;}       
        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_pdispFunctions = pdisp;  
        m_ptinfo->ReleaseTypeAttr(ptypeattr); 
    } 
    m_pdispFunctions->AddRef(); 
    return (ICollection FAR*)m_pdispFunctions;      
     
error:     
    if (ptypeattr) m_ptinfo->ReleaseTypeAttr(ptypeattr);    
    if (pCollection) delete pCollection;   
    return NULL; 
}