com组件类别管理对象枚举

ICatInformationPtr pICatInformation( CLSID_StdComponentCategoriesMgr );IEnumCLSID* pIEnumCLSID = NULL;GUID CATID_CameraCategory = { 0x1f3a6849, 0xee55, 0x4d4c, { 0xb4, 0x62, 0x9a, 0x4, 0x50, 0xd2, 0xee, 0x7a } };HRESULT hr = pICatInformation->EnumClassesOfCategories( 1, &CATID_CameraCategory, 0, NULL, &pIEnumCLSID );ASSERT( NULL != pIEnumCLSID );CLSID clsid = GUID_NULL;while( ( S_OK == hr ) && ( S_OK == ( hr = pIEnumCLSID->Next(1, &clsid, NULL) ) ) ){}pIEnumCLSID->Release();