119 lines
2.6 KiB
C++
119 lines
2.6 KiB
C++
// ImplDispatch.cpp (IDispatch for Extending Dynamic HTML Object Model)
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#include "stdafx.h"
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#include "ImpIDispatch.h"
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#ifdef _DEBUG
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#define new DEBUG_NEW
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#undef THIS_FILE
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static char THIS_FILE[] = __FILE__;
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#endif
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// Hardcoded information for extending the Object Model
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// Typically this would be supplied through a TypeInfo
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// In this case the name "xxyyzz" maps to DISPID_Extend
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const WCHAR pszExtend[10]=L"xxyyzz";
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#define DISPID_Extend 12345
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CImpIDispatch::CImpIDispatch(void)
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{
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m_cRef = 0;
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}
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CImpIDispatch::~CImpIDispatch(void)
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{
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ASSERT(m_cRef == 0);
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}
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STDMETHODIMP CImpIDispatch::QueryInterface(REFIID riid, void **ppv)
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{
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*ppv = NULL;
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if (IID_IDispatch == riid)
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*ppv = this;
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if (NULL != *ppv) {
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((LPUNKNOWN)*ppv)->AddRef();
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return NOERROR;
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}
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return E_NOINTERFACE;
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}
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STDMETHODIMP_(ULONG) CImpIDispatch::AddRef(void)
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{
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return ++m_cRef;
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}
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STDMETHODIMP_(ULONG) CImpIDispatch::Release(void)
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{
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return --m_cRef;
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}
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STDMETHODIMP CImpIDispatch::GetTypeInfoCount(UINT* /*pctinfo*/)
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{
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return E_NOTIMPL;
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}
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STDMETHODIMP CImpIDispatch::GetTypeInfo(
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/* [in] */ UINT /*iTInfo*/,
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/* [in] */ LCID /*lcid*/,
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/* [out] */ ITypeInfo** /*ppTInfo*/)
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{
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return E_NOTIMPL;
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}
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STDMETHODIMP CImpIDispatch::GetIDsOfNames(
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/* [in] */ REFIID riid,
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/* [size_is][in] */ OLECHAR** rgszNames,
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/* [in] */ UINT cNames,
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/* [in] */ LCID lcid,
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/* [size_is][out] */ DISPID* rgDispId)
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{
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HRESULT hr = NOERROR;
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// Hardcoded mapping for this sample
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// A more usual procedure would be to use a TypeInfo
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for (UINT i = 0; i < cNames; i++) {
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if (2 == CompareString(lcid, NORM_IGNOREWIDTH, (char*)pszExtend, 3, (char*)rgszNames[i], 3)) {
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rgDispId[i] = DISPID_Extend;
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}
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else {
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// One or more are unknown so set the return code accordingly
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hr = ResultFromScode(DISP_E_UNKNOWNNAME);
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rgDispId[i] = DISPID_UNKNOWN;
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}
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}
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return hr;
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}
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STDMETHODIMP CImpIDispatch::Invoke(
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/* [in] */ DISPID dispIdMember,
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/* [in] */ REFIID /*riid*/,
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/* [in] */ LCID /*lcid*/,
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/* [in] */ WORD wFlags,
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/* [out][in] */ DISPPARAMS* pDispParams,
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/* [out] */ VARIANT* pVarResult,
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/* [out] */ EXCEPINFO* /*pExcepInfo*/,
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/* [out] */ UINT* puArgErr)
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{
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// For this sample we only support a Property Get on DISPID_Extend
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// returning a BSTR with "Wibble" as the value
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if (dispIdMember == DISPID_Extend) {
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if (wFlags & DISPATCH_PROPERTYGET) {
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if (pVarResult != NULL) {
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WCHAR buff[10] = L"Wibble";
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BSTR bstrRet = SysAllocString(buff);
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VariantInit(pVarResult);
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V_VT(pVarResult) = VT_BSTR;
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V_BSTR(pVarResult) = bstrRet;
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}
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}
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}
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return S_OK;
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}
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