Port keyplus emulator to windows - Githubissues

ahtn / keyplus

An easy to use, wired and wireless modular keyboard firmware

MIT License

246 stars 40 forks source link

Port keyplus emulator to windows #97

Open ahtn opened 5 years ago

ahtn commented 5 years ago

Two approaches that might work:

Method 1 - Input APIs

Raw Input to read HID codes from devices
BlockInput to prevent the original behaviour of keys being generated
SendInput to generate new keyboard/mouse events.

Pros:

runs in user-space
should be easy to implement.

Cons:

BlockInput and SendInput don't work when a UAC prompt is active, nor when Ctrl+Alt+Del combination is used.
BlockInput blocks all input devices, so need to forward events of all devices that we aren't remapping.
Might not work correctly with some applications depending on how they handle keyboard input.

Method 2 - Filter driver

Write a Keyboard and Mouse Filter Drivers.

Pros:

The OS should treat the virtual keyboard and mouse the same way as real hardware.
Should work in UAC and when Ctrl+Alt+Del is pressed.

Cons:

Filter drivers run in kernal-space, so harder to work with. A driver crash means the OS crashes, aka BSOD.
A user-space program to communicate with the driver will be needed, so more complexity.
Might be harder to install??

Other considerations

Microsoft's C compiler MSCV only has partial support for C99, so some keyplus code may not compile. To work around, will need to either rewrite some code, or compile it as C++ code.