NewCell creates a new Cell instance.

NewSheet creates a new Sheet instance.

NewWorkbook initializes a new Workbook instance.

Excel 97-2003 workbook.

Standard Excel workbook.

Excel workbook with macros.

Cell represents a single cell in a spreadsheet.

Sheet represents a single worksheet within a spreadsheet.

Workbook represents a spreadsheet file containing multiple sheets.

Extension represents the type of file extension for a workbook.