Question

There might be one for WPF but not sure about WinForms.

Answer 1

I’m not sure there is something in C#, but there is a good library to simulate the keyboard inputs. So you can try to use it (Windows Input Simulator) and develop your own virtual keyboard.

It’s very simple to use for example:

//Simulate Shift
public void btn_Shift(object sender, EventArgs e)
{
   InputSimulator.SimulateKeyPress(VirtualKeyCode.SHIFT);
}