The method is called when we enter a new block of search (document, page, bookmarks etc). The operation is monitoring the callback result and if the HRESULT IS an error and NOT E_NOTIMPL then this situation is perceived as a USER_CANCEL.
HRESULT OnStartPtr([in] IPXV_SearchPtr* pPtr);
- [in] Pointer to IPXV_SearchPtr containing the information about the search whereabouts.
Returns S_OK if operation was successful or error code in other cases.