By default, when you create a SpreadsheetControl instance, it contains a workbook with one empty worksheet ("Sheet1"). The same workbook is also created when you call the control's SpreadsheetControl.CreateNewDocument method or the CreateNewDocument method of the IWorkbook object.
The SpreadsheetControl.EmptyDocumentCreated event occurs after a new document is created.
To load an existing document into a SpreadsheetControl, use the SpreadsheetControl.LoadDocument or IWorkbook.LoadDocument method. To save a workbook after all modifications are complete, use the SpreadsheetControl.SaveDocument or IWorkbook.SaveDocument method.