Developer's Guide to Web Application Security

Table 3.3 continued File Extensions Used in Microsoft Office 2007

Extension File Type Description

.xltx Excel 2007 XML Default file format used when saving

template an Excel template in Office 2007.

Cannot store VBA macros or Excel 4.0

macro sheets (.xlm files).

,xltm Excel 2007 XML Same as a .docx file, but can store

template that is VBA code or Excel 4.0 macro sheets

macro enabled (.xlm files).

.xlsb Excel 2007 binary Binary file format

workbook that does not use XML, and allows

VBA code and Excel 4.0 macro sheets

(.xlm files).

.xlam Excel 2007 add-in Add-in that supports VBA projects

that is macro enabled and Excel 4.0 macro sheets (.xlm files)

to work ...