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- /*************************************************************************
- **
- ** This is a part of the Microsoft Source Code Samples.
- **
- ** Copyright (C) 1992-1997 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
- **
- ** struct.cpp
- **
- ** CStruct 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"
-
- /*
- * CStruct::Create
- *
- * Purpose:
- * Creates an instance of the Struct automation object and initializes it.
- *
- * Parameters:
- * ptinfo TypeInfo of struct..
- * ppStruct Returns Struct automation object.
- *
- * Return Value:
- * HRESULT
- *
- */
- HRESULT
- CStruct::Create(LPTYPEINFO ptinfo, CStruct FAR* FAR* ppStruct)
- {
- HRESULT hr;
- CStruct FAR* pStruct = NULL;
-
- *ppStruct = NULL;
-
- // Create object.
- pStruct = new CStruct();
- if (pStruct == NULL)
- {
- hr = E_OUTOFMEMORY;
- goto error;
- }
- // Load type information for the object from type library.
- hr = pStruct->LoadTypeInfo(IID_IStruct);
- if (FAILED(hr))
- goto error;
- // Initialize base class, CTypeInfo
- hr = pStruct->_InitTypeInfo(ptinfo);
- if (FAILED(hr))
- goto error;
-
- ptinfo->AddRef();
- pStruct->m_ptinfo = ptinfo;
-
- #ifdef _DEBUG
- lstrcpyn(pStruct->m_szClassName, TEXT("Struct"), 100);
- #endif
-
- *ppStruct = pStruct;
- return NOERROR;
-
- error:
- if (pStruct == NULL) return E_OUTOFMEMORY;
- if (pStruct->m_ptinfo) pStruct->m_ptinfo->Release();
-
- // Set to NULL to prevent destructor from attempting to free again
- pStruct->m_ptinfo = NULL;
-
- delete pStruct;
- return hr;
- }
-
- /*
- * CStruct::CStruct
- *
- * Purpose:
- * Constructor for CStruct object. Initializes members to NULL.
- *
- */
- CStruct::CStruct()
- {
- m_pdispMembers = NULL;
- m_ptinfo = NULL;
- }
-
- /*
- * CStruct::~CStruct
- *
- * Purpose:
- * Destructor for CStruct object.
- *
- */
- CStruct::~CStruct()
- {
- if (m_pdispMembers) m_pdispMembers->Release();
- if (m_ptinfo) m_ptinfo->Release();
- }
-
- STDMETHODIMP_(REFCLSID)
- CStruct::GetInterfaceID()
- {
- return IID_IStruct;
- }
-
- STDMETHODIMP_(ICollection FAR*)
- CStruct::get_Members()
- {
- HRESULT hr;
- CProperty FAR* pProperty;
- CCollection FAR* pCollection = NULL;
- LPDISPATCH pdisp;
- LPVARDESC pvardesc = NULL;
- LPTYPEATTR ptypeattr = NULL;
- unsigned short n;
-
- if (m_pdispMembers == NULL)
- {
- // Create a collection of structure members
- 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;}
- 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_pdispMembers = pdisp;
- m_ptinfo->ReleaseTypeAttr(ptypeattr);
- }
- m_pdispMembers->AddRef();
- return (ICollection FAR*)m_pdispMembers;
-
- error:
- if (ptypeattr) m_ptinfo->ReleaseTypeAttr(ptypeattr);
- if (pCollection) delete pCollection;
- if (pvardesc) m_ptinfo->ReleaseVarDesc(pvardesc);
- return NULL;
- }
-