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Get Keyboard Input When Unity Is Running Background

using System.Collections using System.Collections.Generic using UnityEngine using System using System.Diagnostics using System.Runtime.InteropServices public class jingJue : MonoBehaviour { //Intercept button private const int WH_KEYBOARD_LL = 13 private const int WM_KEYDOWN = 0x0100 private static LowLevelKeyboardProc _proc = HookCallback private static IntPtr _hookID = IntPtr.Zero // Use this for initialization void Start () { _hookID = SetHook(_proc) } void OnApplicationQuit() { UnhookWindowsHookEx(_hookID) } private static IntPtr SetHook(LowLevelKeyboardProc proc) { using (Process curProcess = Process.GetCurrentProcess()) using (ProcessModule curModule = curProcess.MainModule) { return SetWindowsHookEx(WH_KEYBOARD_LL, proc, GetModuleHandle(curModule.ModuleName), 0) } } private delegate IntPtr LowLevelKeyboardProc(int nCode, IntPtr wParam, IntPtr lParam) private static IntPtr HookCallback(int nCode, IntPtr wParam, IntPtr lParam) { if (nCode >= 0 && wParam == (IntPtr)WM_KEYDOWN) { int vkCode = Marshal.ReadInt32(lParam) //Print case code UnityEngine.Debug.Log(vkCode) if (vkCode == 13) { //13 is the key code for carriage return // Here you can write key events } } return CallNextHookEx(_hookID, nCode, wParam, lParam) } // Update is called once per frame void Update () { } [DllImport('user32.dll', CharSet = CharSet.Auto, SetLastError = true)] private static extern IntPtr SetWindowsHookEx(int idHook, LowLevelKeyboardProc lpfn, IntPtr hMod, uint dwThreadId) [DllImport('user32.dll', CharSet = CharSet.Auto, SetLastError = true)] [return: MarshalAs(UnmanagedType.Bool)] private static extern bool UnhookWindowsHookEx(IntPtr hhk) [DllImport('user32.dll', CharSet = CharSet.Auto, SetLastError = true)] private static extern IntPtr CallNextHookEx(IntPtr hhk, int nCode, IntPtr wParam, IntPtr lParam) [DllImport('kernel32.dll', CharSet = CharSet.Auto, SetLastError = true)] private static extern IntPtr GetModuleHandle(string lpModuleName) }

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