This can be done by writing an app that uses Windows API hook functions. It could be made to work with most apps - since hook functions intercept messages befo

This can be done by writing an app that uses Windows API hook functions. It could be made to work with most apps - since hook functions intercept messages before the app gets them. A simple "Mirror whatever I type into a given window's input" is not too hard to develop. But this is a serious security risk - what if someone set this up to some invisible window and grabbed everything you type? Sure, many apps use hook functions (for example some remote desktop software), but it's a dicey thing to let some program hook everything that you type. If you can trust the code, then it's cool