keysrokes reading

Question

How to read the keystrokes using c# and for example I need to verify if a user press the windows + D to go desktop my tool need to verify that the user has pressed those key combinations ?? can you suggest me ideas ? TIA

Answer 1

For example, with a Keyboard Hook =>

       // Variables  
        static int hHook = 0;  
        HookProc KeyboardLLProcedure;          
          
        // Code  
        KeyboardLLProcedure = new HookProc(KeyboardLLProc);     
        hHook = SetWindowsHookEx(WH_KEYBOARD_LL, KeyboardLLProcedure, (IntPtr)0, 0);  
          
        // Procedure  
        public static int KeyboardLLProc(int nCode, IntPtr wParam, IntPtr lParam)  
        {  
            if ((nCode >= 0))  
            {  
                KBDLLHOOKSTRUCT pKBDLLHOOKSTRUCT = new KBDLLHOOKSTRUCT();  
                pKBDLLHOOKSTRUCT = (KBDLLHOOKSTRUCT)Marshal.PtrToStructure(lParam, pKBDLLHOOKSTRUCT.GetType());  
  
                if (wParam == (IntPtr)WM_KEYDOWN)  
                {  
                    if (pKBDLLHOOKSTRUCT.vkCode == (short)Keys.D)  
                    {  
                        bool bKeyDown = (GetAsyncKeyState((int)Keys.LWin) & 0x8000) == 0x8000;  
                        if (bKeyDown)  
                        {  
                            Console.Beep(8000, 10);  
                            Console.WriteLine("[Win] + D intercepted");  
                            return 1;  
                        }  
                    }  
                }                 
            }  
            return nCode < 0 ? CallNextHookEx(hHook, nCode, wParam, lParam) : 0;  
        }  
          
        // Declarations  
        public const int WH_KEYBOARD_LL = 13;  
        public const int WM_KEYDOWN = 0x0100;  
          
        [DllImport("User32.dll", SetLastError = true, CharSet = CharSet.Unicode)]  
        public static extern short GetAsyncKeyState(int nVirtKey);  
          
        [StructLayoutAttribute(LayoutKind.Sequential, CharSet = CharSet.Unicode)]  
        public struct KBDLLHOOKSTRUCT  
        {            
            public int vkCode;  
            public int scanCode;  
            public int flags;  
            public int time;  
            public uint dwExtraInfo;  
        }        
  
        public delegate int HookProc(int nCode, IntPtr wParam, IntPtr lParam);  
  
        [DllImport("User32.dll", CharSet = CharSet.Auto,  CallingConvention = CallingConvention.StdCall)]  
        public static extern int SetWindowsHookEx(int idHook, HookProc lpfn, IntPtr hInstance, int threadId);  
  
        [DllImport("User32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]  
        public static extern bool UnhookWindowsHookEx(int idHook);  
  
        [DllImport("User32.dll", CharSet = CharSet.Auto,   CallingConvention = CallingConvention.StdCall)]  
        public static extern int CallNextHookEx(int idHook, int nCode, IntPtr wParam, IntPtr lParam);  

Answer 2

do this will read any key stroke combinations for example like Insert + T , Insert + Up arrow can you clarify that ?? If you clarify me it will be very helpful TIA

Answer 3

Variables