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I don't even know if this is possible. I have the latest VBox software running on a Windows 10 Pro machine (64 bit). And I have Windows XP Pro SP3 running as a guest. The networking between host and guest works just fine. The only exception is that I can't access my Kodak ESP 7250 printer on Win 10 machine from the XP client. Is there any way I can access and print from the XP client? Or is it even possible?

Thanks

It is certainly possible, provided you have an XP compatible driver for that printer. You say that "networking between host and guest works just fine" - but what kind of networking is that? If it's bridged or host-only then all you have to do is enable printer sharing on the host, and the guest should detect it. Modern Windows would find and install a printer driver automatically, but with XP you may have to install one manually.