Windows Data Hooking & Modification -- 2

I have a Windows-based application whose runtime behaviour I need to intercept so I can change specific data before the original program sees it. In practical terms this means inserting a reliable hooking layer—whether by API hooking, DLL injection, or another method you propose—that can capture the desired calls or messages, let me tweak the payload, and then pass the altered data back to the target process seamlessly.

Here is what matters most to me: the interception must be invisible to the user, stable across sessions, and light on resources. I am open to whichever technique you feel fits best, so long as it gives me full control over modifying the captured data in real time on Windows 10 and 11.

Deliverables I expect
• A compiled solution (DLL/executable) that demonstrates the hook and successful data modification
• Well-commented source code so I can extend or recompile later
• A short read-me outlining build steps and how to deploy or uninstall the hook

Please factor in that I will test by running the original app, verifying the alteration happens exactly where requested, and confirming that no crashes or abnormal behaviour occur. If this sounds like your area of expertise, I’m ready to move quickly.