void history_ActionUndone( object sender, CommandEventArgs e )
 {
     m_undoneCallCount++;
 }
 public void OnActionUndoEvent( object sender, CommandEventArgs args )
 {
     m_undoCallCount++;
 }
 void history_ActionExecuted( object sender, CommandEventArgs e )
 {
     m_executedCallCount++;
 }
 public void OnActionExecuteEvent( object sender, CommandEventArgs args )
 {
     m_executeCallCount++;
 }