public void ghook_KeyDown(object sender, KeyEventArgs e)
        {
           char? a =   karkter(e);
           textBox1.Text += a + " - ";
        }

private static char? karkter(KeyEventArgs e)
{
          bool firstChance = false; ;
            byte[] keyStates = new byte[256];
            InputLanguage inputLanguage = InputLanguage.CurrentInputLanguage;
            const byte keyPressed = 0x80;
            keyStates[(int)((Keys)e.KeyCode & Keys.KeyCode)] = keyPressed;
            keyStates[(int)Keys.ShiftKey] = (((Keys)e.KeyCode & Keys.Shift) == Keys.Shift) ? keyPressed : (byte)0;
            keyStates[(int)Keys.ControlKey] = (((Keys)e.KeyCode & Keys.Control) == Keys.Control) ? keyPressed : (byte)0;
            keyStates[(int)Keys.Menu] = (((Keys)e.KeyCode & Keys.Alt) == Keys.Alt) ? keyPressed : (byte)0;

            StringBuilder sb = new StringBuilder(10);
            int ret = ToUnicodeEx((Keys)e.KeyCode, 0, keyStates, sb, sb.Capacity, 0, inputLanguage.Handle);
            if (ret == 1)
                return sb[0];

            if (ret == -1)
            {
                if (firstChance)
                {
                    
                }
                return null;
            } return null;
}
        [DllImport("user32.dll", CharSet = CharSet.Unicode)]
        private static extern int ToUnicodeEx(Keys wVirtKey, uint wScanCode, byte[] lpKeyState, StringBuilder pwszBuff, int cchBuff, uint wFlags, IntPtr dwhkl);