VFP9 will work with any version of Windows released between 1999 and 2050, as long as they are Intel versions of WIndows.
>Does VFP9 work with Windows 8.1?
>
>Do I need to make any code changes to my VFP9 apps to get it to work in Windows 8.1? ..and if so, what are they?
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>Does VFP9 itself work in Windows 8.1 to develop apps?