ILoadChangeContext::GetSyncChange

Gets the change item for which the change data should be retrieved from the item store.

Syntax

HRESULT GetSyncChange(
  ISyncChange ** ppSyncChange);

Parameters

• ppSyncChange
  [out] Returns the change item for which the change data should be retrieved from the item store.

Return Value

• S_OK

• E_POINTER

• SYNC_E_INTERNAL_ERROR when an internal error occurs.

Example

The following example is an implementation of ISynchronousDataRetriever::LoadChangeData that uses GetSyncChange to get the specified change to load. The example finds the change in a custom data store and returns a copy of it.

STDMETHODIMP CItemStore::LoadChangeData(
    ILoadChangeContext * pLoadChangeContext,
    IUnknown ** ppUnkData)
{
    HRESULT hr = E_UNEXPECTED;

    if (NULL == pLoadChangeContext || NULL == ppUnkData)
    {
        hr = E_POINTER;    
    }
    else
    {
        // Find the item in the data store, clone it, and return its IUnknown interface.
        ISyncChange* pChange = NULL;
        hr = pLoadChangeContext->GetSyncChange(&pChange);
        if (SUCCEEDED(hr))
        {
            SYNC_GID gidItem;
            DWORD cbID = sizeof(gidItem);
            hr = pChange->GetRootItemId((BYTE*)&gidItem, &cbID);
            if (SUCCEEDED(hr))
            {
                IXMLDOMNode* pNodeItem = NULL;
                hr = FindItem(&gidItem, &pNodeItem);
                if (SUCCEEDED(hr))
                {
                    IXMLDOMNode* pNodeClone = NULL;
                    hr = pNodeItem->cloneNode(TRUE, &pNodeClone);
                    if (SUCCEEDED(hr))
                    {
                        hr = pNodeClone->QueryInterface(IID_IUnknown, (void**)ppUnkData);

                        pNodeClone->Release();
                    }

                    pNodeItem->Release();                
                }
            }

            pChange->Release();
        }
    }

    return hr;
}

See Also

Reference

ILoadChangeContext Interface