Written by Allen Wyatt (last updated July 19, 2025)
This tip applies to Excel 2007, 2010, 2013, 2016, 2019, 2021, 2024, and Excel in Microsoft 365
When using a macro to write information to a text file, you may want to add information to an existing file, rather than creating a new text file from scratch. To do this, all you need to do is open the file for Append rather than Output. The following code shows this process:
Open "MyFile.Dat" For Append As #1 For J = 1 to NewValues Print #1, UserVals(OrigVals + J) Next J Close #1
When the file is opened for Append mode, any new information is added to the end of the file, without disturbing the existing contents.
Note:
ExcelTips is your source for cost-effective Microsoft Excel training. This tip (9206) applies to Microsoft Excel 2007, 2010, 2013, 2016, 2019, 2021, 2024, and Excel in Microsoft 365. You can find a version of this tip for the older menu interface of Excel here: Appending to a Non-Excel Text File.
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