It is in the interest of Microsoft for VB6 applications to run on Windows 10, and therefore they are likely to be. The same is probably true for most older application platforms: Microsoft is working to maintain compatibility. IDE works in Windows 7 (not sure about 8 or 10).
However, since Microsoft says that VB6 will work, this does not mean that your specific application will work, especially if you use third-party components. You should at least think about moving to another development environment.
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