From Tracker Software PDF SDK
Called by the document to notify that the handler would be no longer set as a selection handler.
HRESULT OnStopSelHandling([in] IPXV_Document* pDoc, [in] IPXV_DocSelection* pOldDocSel);
- [in] Pointer to IPXV_Document containing the source document.
- [in] Pointer to IPXV_DocSelection containing the old document's selection.
Returns S_OK if operation was successful or error code in other cases.