Hi @Sanghun Kim
The earliest version I can find that can apply ExportAsFixedFormat
method is Office 2007.
Reference:
https://stackoverflow.com/questions/634990/converting-excel-to-pdf-with-vs2008-and-office2007
For the minimum version of Windows, in my opinion, it is also related to the Office version. As long as Excel 2007 or later can be installed and used, the Windows system version should not affect the availability of this feature.
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