C# Actively detect Lock keys

Question

I have a wireless keyboard and mouse that doesn\'t have any lock indicators, nor any software bundled to provide a visual aid, so I\'m making my own.

I got it so that if

Answer 1

You will want to register some sort of keyboard hook to listen for the key presses and then retrieve the state of the lock keys like this:
http://blogs.msdn.com/b/toub/archive/2006/05/03/589423.aspx

In addition to the above article, make the below modifications to capture state of the lock keys:

private static IntPtr HookCallback(
    int nCode, IntPtr wParam, IntPtr lParam)
{
    if (nCode >= 0 && wParam == (IntPtr)WM_KEYDOWN)
    {
        int vkCode = Marshal.ReadInt32(lParam);
        Keys key = (Keys)vkCode;
        if (key == Keys.Capital)
        {
            Console.WriteLine("Caps Lock: " + !Control.IsKeyLocked(Keys.CapsLock)); 
        }
        if (key == Keys.NumLock)
        {
            Console.WriteLine("NumLock: " + !Control.IsKeyLocked(Keys.NumLock));
        }
        if (key == Keys.Scroll)
        {
            Console.WriteLine("Scroll Lock: " + !Control.IsKeyLocked(Keys.Scroll));
        }
        Console.WriteLine((Keys)vkCode);
    }
    return CallNextHookEx(_hookID, nCode, wParam, lParam);
}