A VB6 library for consuming/producing BIFF12 (.xlsb) spreadsheets
2018-08-13 Make some changes to cBiff12Writer.cls, Added function AddSheet to cBiff12Writer.cls (works only after the previous sheet is complete, no return to edit more i think. Optional parameter sheetname in function Init and AddSheet. Some changes to cBiff12Part.cls and cBiff12Container.cls to work with multiple sheets.