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How to: Clear the Undo Stack

  • Articolo

The following procedure below explains how to clear the undo stack.

To clear the undo stack

  • To clear the undo stack use the IOleUndoManager::DiscardFrom method. The following is an example of this:

    HRESULT CCmdWindow::ClearUndoStack()
{
  HRESULT hr = S_OK;

  if (m_pUndoMgr == NULL)
    {
    IfFailGo(m_pTextLines->GetUndoManager(&m_pUndoMgr));
    ASSERT(m_pUndoMgr != NULL, "",;);
    }

  IfFailGo(m_pUndoMgr->DiscardFrom(NULL));

Error:
  return hr;
}

See Also

Tasks

How to: Implement Undo Management