C# GetKeyState Example

 public abstract class Keyboard
    {
        [Flags]
        private enum KeyStates
        {
            None = 0,
            Down = 1,
            Toggled = 2
        }

        [DllImport("user32.dll", CharSet = CharSet.Auto, ExactSpelling = true)]
        private static extern short GetKeyState(int keyCode);

        private static KeyStates GetKeyState(Keys key)
        {
            KeyStates state = KeyStates.None;

            short retVal = GetKeyState((int)key);

       
            //otherwise, it is up.
            if ((retVal & 0x8000) == 0x8000)
                state |= KeyStates.Down;

              if ((retVal & 1) == 1)
                state |= KeyStates.Toggled;

            return state;
        }

        public static bool IsKeyDown(Keys key)
        {
            return KeyStates.Down == (GetKeyState(key) & KeyStates.Down);
        }

        public static bool IsKeyToggled(Keys key)
        {
            return KeyStates.Toggled == (GetKeyState(key) & KeyStates.Toggled);
        }
    }





Add Form Code.


Example;




private void timer1_Tick(object sender, EventArgs e)
        {
            bool status = IsKeyDown(Keys.B);//set keys
            if (status == true) { MessageBox.Show("B pressed."); }
        }