[LouisVign]

Is is possible to have a mouse/keyboard control another mouse/keyboard directly?

I do not mean a mouse/keyboard controlling a non-existent mouse/keyboard or software such as Synergy, Input Director, etc... These all control computers through a means virtual/fake mouse/keyboards which is then detected by other software because it isn't authentic.

I'm running a virtual machine (guestOS) which has it's own real/physical mouse and keyboard for itself while the host (computer running VM) has it's own real/physical mouse and keyboard (basically I have two keyboards and two mouses on one computer). I'm attempting to control two games at once, I can successfully use one set of KB/M to control the virtual machine and another set to control the host, simultaneously.
Now I want one mouse/KB to control the other but all the software I have try to create a fake mouse and keyboard instead of using the physical ones for input which leads to games falsely detecting macro/hacking attempt.

[webdev77]

You cannot simultaneously input keyboard commands to multiple programs at one time using a single keyboard. Windows is designed so that the key presses are sent to only one program that currently has focus.

[datguy.dev]

I wonder how far you would get with an interface board? Hardware hack. That would mimic the host, and you could dedicate the device to the guest. Never tried it so..