he vba.Workbook object represents the Excel file (Excel workbook) loaded into
the Excel application. The vba.Workbook object may be obtained by calling the
ActiveWorkbook property of the Application object, by using indexing property
of the vba.Workbooks object or by calling the Parent property of the
vba.Worksheet(s) object. The vba.Workbook object is supplied into several
event handlers by the ExcelListener.