Sets the name of the sheet. This is the name that appears in the sheet name tab. This is also the name that is used when exporting sheets to Excel. If exporting to Excel, be sure that the sheet name does not have characters considered invalid by Excel. Sheet names may have spaces. When referring to a sheet name in a cell reference, be sure to use single quotes if the sheet name has a space in it.
Names cannot be repeated: that is, you cannot use the same name for two sheets in the same workbook.