capture key combination controlv in c# using global hook keys in Windows Form

Please refer below links

1. https://social.msdn.microsoft.com/Forums/windows/en-us/5824457e-9112-43ef-83df-7037a36dd365/what-is-the-keychar-for-ctrlc-and-ctrlv-in-c/
2. https://social.msdn.microsoft.com/Forums/vstudio/en-US/8a2df090-0748-4dff-a7ae-9aed518f02ef/hook-system-keyboard-ctrl-key-twice?forum=vcgeneral
3. http://stackoverflow.com/questions/2454089/how-to-hook-keystroke-to-change-from-c-to-ctrlc-in-net

Key board not working when this code is run what will be the reason

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Text.RegularExpressions;
using System.IO;
using System.Drawing.Imaging;

using System.Runtime.InteropServices;

namespace WFA
{
    
    public partial class Form1 : Form
    {
        
        public Form1()
        {

            InitializeComponent();

        }
        // ... { GLOBAL HOOK }
        [DllImport("user32.dll")]
        static extern IntPtr SetWindowsHookEx(int idHook, LowLevelKeyboardProc callback, IntPtr hInstance, uint threadId);

        [DllImport("user32.dll")]
        static extern bool UnhookWindowsHookEx(IntPtr hInstance);

        [DllImport("user32.dll")]
        static extern IntPtr CallNextHookEx(IntPtr idHook, int nCode, int wParam, IntPtr lParam);

        [DllImport("kernel32.dll")]
        static extern IntPtr LoadLibrary(string lpFileName);

        private delegate IntPtr LowLevelKeyboardProc(int nCode, IntPtr wParam, IntPtr lParam);

        const int WH_KEYBOARD_LL = 13; 
        const int WM_KEYDOWN = 0x100; 

        private LowLevelKeyboardProc _proc = hookProc;

        private static IntPtr hhook = IntPtr.Zero;

        public void SetHook()
        {
            IntPtr hInstance = LoadLibrary("User32");
            hhook = SetWindowsHookEx(WH_KEYBOARD_LL, _proc, hInstance, 0);
        }

        public static void UnHook()
        {
            UnhookWindowsHookEx(hhook);
        }

        public static IntPtr hookProc(int code, IntPtr wParam, IntPtr lParam)
        {
            if (code >= 0 && wParam == (IntPtr)WM_KEYDOWN)
            {
                int vkCode = Marshal.ReadInt32(lParam);
                //////ОБРАБОТКА НАЖАТИЯ
                if (vkCode.ToString() == "162")
                {
                    //PrintScreen();
                    Bitmap printscreen = new Bitmap(Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height);
                    Graphics graphics = Graphics.FromImage(printscreen as Image);
                    graphics.CopyFromScreen(0, 0, 0, 0, printscreen.Size);
                    printscreen.Save(@"D:\printscreen.jpg", ImageFormat.Jpeg);
                    MessageBox.Show("You pressed a CTR");
                }
                return (IntPtr)1;
            }
            else
                return CallNextHookEx(hhook, code, (int)wParam, lParam);
        }
 


        private void Form1_Load_1(object sender, EventArgs e)
        {
            SetHook();
        }

        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
           UnHook();
        }
        private void PrintScreen()
        {

            Bitmap printscreen = new Bitmap(Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height);
            Graphics graphics = Graphics.FromImage(printscreen as Image);
            graphics.CopyFromScreen(0, 0, 0, 0, printscreen.Size);
            printscreen.Save(@"D:\printscreen.jpg", ImageFormat.Jpeg);


        }


    }

Usig keylog it is ppossible to capture single characters 
 public void gHook_KeyDown(object sender, KeyEventArgs e)
        {


            textBox1.Text += ((char)e.KeyValue).ToString();
            if (e.KeyCode == Keys.V)
            {
                PrintScreen();
            }

        }