What filename extensions open in Excel on Windows?

What filename extensions open in Excel on Windows? If I save a text file on Windows as "foo.csv", it shows up with an Excel-style icon (with an "a," on it), and if I double-click it, it opens in Excel. This is really handy!
Asked by: Guest \| Views: 299

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Guest [Entry]

"You can determine the default file types for excel by:

XP and below: you can open an explorer window, click tools, folder options, and, finally, click the ""file types"" tab.

Windows 7*(vista should be similar)*: Open control panel in the ""old view"", click ""Default programs"", Click ""Set a file type or protocol with a program""

For both you can sort the list by ""current default/File type"" and find Excel in the list. That will tell you all of the extensions that are associated."