学步园

//相关头文件 及库文件<br /> #include <DShow.h><br /> #pragma comment(lib,"strmiids.lib")<br /> #pragma comment(lib,"quartz.lib")</p> <p>#include <shlwapi.h><br /> #pragma comment(lib,"shlwapi.lib")</p> <p>#include <tchar.h></p> <p>//定义相关数据<br /> #define DS_CATEGORIE_IDX 3<br /> #define SAFE_RELEASE(x) { if(x) x->Release(); x = NULL; }</p> <p>typedef struct _category_info<br /> {<br /> const CLSID *pclsid;<br /> TCHAR szName[128];<br /> }CATEGORY_INFO_DS;</p> <p>const CATEGORY_INFO_DS categories[] = {</p> <p> &CLSID_AudioInputDeviceCategory, TEXT("Audio Capture Devices/0"),<br /> &CLSID_AudioCompressorCategory, TEXT("Audio Compressors/0"),<br /> &CLSID_AudioRendererCategory, TEXT("Audio Renderers/0"),<br /> &CLSID_LegacyAmFilterCategory, TEXT("DirectShow Filters/0"),<br /> &CLSID_MidiRendererCategory, TEXT("Midi Renderers/0"),<br /> &CLSID_VideoInputDeviceCategory, TEXT("Video Capture Devices/0"),<br /> &CLSID_VideoCompressorCategory, TEXT("Video Compressors/0"),<br /> };</p> <p>//定义相关成员函数及成员变量<br /> public:<br /> CListCtrl m_listSystemFilter;</p> <p>public:<br /> BOOL GetDllPathForClsid(LPCTSTR lpClsid,LPTSTR pFile,DWORD dwLen);<br /> STDMETHOD(EnumFilter)(IEnumMoniker *pEnumCat);<br /> STDMETHOD(EnumFilter)(int ncatalogIdx);</p> <p>public:<br /> ICreateDevEnum *m_pSysDevEnum;<br /> virtual BOOL OnInitDialog();</p> <p>//实现部分BOOL CtestsystemfilterDlg::OnInitDialog()<br /> {<br /> CDialog::OnInitDialog();</p> <p> m_listSystemFilter.SetExtendedStyle(LVS_EX_FULLROWSELECT|LVS_EX_GRIDLINES);<br /> m_listSystemFilter.InsertColumn(0,TEXT("Name"),LVCFMT_LEFT,200);<br /> m_listSystemFilter.InsertColumn(1,TEXT("CLSID"),LVCFMT_LEFT,360);<br /> m_listSystemFilter.InsertColumn(2,TEXT("Path"),LVCFMT_LEFT,360);</p> <p> this->EnumFilter(DS_CATEGORIE_IDX);</p> <p> return TRUE; // return TRUE unless you set the focus to a control<br /> // 异常: OCX 属性页应返回 FALSE<br /> }</p> <p>BOOL CtestsystemfilterDlg::GetDllPathForClsid(LPCTSTR lpClsid,LPTSTR pFile,DWORD dwLen)<br /> {<br /> TCHAR szSubKey[MAX_PATH] = TEXT("");<br /> DWORD dwType = REG_SZ;</p> <p> _sntprintf(szSubKey,sizeof(szSubKey),TEXT("CLSID//%s//InprocServer32"),lpClsid);<br /> if(ERROR_SUCCESS == SHGetValue(HKEY_CLASSES_ROOT,szSubKey,TEXT(""),&dwType,pFile,&dwLen))<br /> return TRUE;</p> <p> return FALSE;<br /> }</p> <p>STDMETHODIMP CtestsystemfilterDlg::EnumFilter(int ncatalogIdx)<br /> {<br /> m_pSysDevEnum = NULL;<br /> if(FAILED(CoCreateInstance(CLSID_SystemDeviceEnum,NULL,CLSCTX_INPROC,__uuidof(ICreateDevEnum),(void**)&m_pSysDevEnum)))<br /> return E_FAIL;</p> <p> IEnumMoniker *pEnumCat = NULL;<br /> const CLSID *pClsid = categories[ncatalogIdx].pclsid;<br /> if(FAILED(m_pSysDevEnum->CreateClassEnumerator(*pClsid,&pEnumCat,0)))<br /> return E_FAIL;</p> <p> return EnumFilter(pEnumCat);<br /> }</p> <p>STDMETHODIMP CtestsystemfilterDlg::EnumFilter(IEnumMoniker *pEnumCat)<br /> {<br /> if(NULL == pEnumCat)<br /> return E_FAIL;</p> <p> HRESULT hr = E_FAIL;<br /> int nListRow = 0;<br /> IMoniker *pMoniker = NULL;<br /> ULONG cFetched;<br /> while(SUCCEEDED(pEnumCat->Next(1,&pMoniker,&cFetched)) && NULL != pMoniker)<br /> {<br /> IPropertyBag *pPropBag = NULL;<br /> hr = pMoniker->BindToStorage(0,0,IID_IPropertyBag,(void**)&pPropBag);<br /> if(FAILED(hr)) continue;</p> <p> VARIANT varName;<br /> varName.vt = VT_BSTR;<br /> hr = pPropBag->Read(L"FriendlyName",&varName,0);<br /> if(FAILED(hr)) continue;<br /> m_listSystemFilter.InsertItem(nListRow,varName.bstrVal);</p> <p> VARIANT varClsid;<br /> varClsid.vt = VT_BSTR;<br /> hr = pPropBag->Read(L"CLSID",&varClsid,0);<br /> if(SUCCEEDED(hr))<br /> {<br /> m_listSystemFilter.SetItemText(nListRow,1,varClsid.bstrVal);</p> <p> TCHAR szFilePath[MAX_PATH] = TEXT("");<br /> if(GetDllPathForClsid((LPTSTR)varClsid.bstrVal,szFilePath,MAX_PATH))<br /> m_listSystemFilter.SetItemText(nListRow,2,szFilePath);<br /> }</p> <p> SAFE_RELEASE(pPropBag);<br /> SAFE_RELEASE(pMoniker);</p> <p> nListRow++;<br /> }</p> <p> SAFE_RELEASE(pEnumCat);<br /> SAFE_RELEASE(m_pSysDevEnum); </p> <p> return hr;<br /> }<br />

运行结果图：