XLS files are spreadsheet files created by Microsoft Office Excel. An Excel spreadsheet can contain anything from images and plain text to graphs and tables and can be opened using Excel.

How to Automatically Convert an Excel File to Text Using Visual Basic. Microsoft's ubiquitous spreadsheet application, Excel, is a useful tool for small and large businesses alike.

A CSV (comma-separated values) file is a text file in which information is separated by commas. CSV files are most commonly encountered in spreadsheets and databases. You can use a CSV file to ...