Microsoft Excel has an import wizard, but if you structure the text correctly, you can bypass the wizard altogether.

If the DAT file you're trying to open is text, you can convert the file into text in the Microsoft Excel program by first saving it as a CSV file.

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 ...

Launch Visual Basic 6 or Visual Basic Express. Open the project file in which you want to create a module and command button that creates an Excel spreadsheet from selected data.

VBA sub procedures can perform lots of tasks and there are many ways to execute those functions in Microsoft Excel.