How to intercept all the keyboard events and prevent losing focus in a WinForms application?

Question

A friend of mine is blind and I\'ve got an idea of developing a program that would let him use a PC with the help of a blind typing method and audial feedback. The experienc

Answer 1

I know this topic is old, but I found a possible solution. You can use the last answer and edit it a little bit:

Instead of calling the next hook:

private static IntPtr HookCallback(int nCode, IntPtr wParam, IntPtr lParam) {
    if (nCode >= 0 && wParam == (IntPtr)WM_KEYDOWN)
    {
        int vkCode = Marshal.ReadInt32(lParam);
        Console.WriteLine((Keys)vkCode);
    }
    return CallNextHookEx(_hookID, nCode, wParam, lParam);
}

just return -1 for stopping preceding any handle to other controls:

private static IntPtr HookCallback(int nCode, IntPtr wParam, IntPtr lParam) {
    if (nCode >= 0 && wParam == (IntPtr)WM_KEYDOWN)
    {
        int vkCode = Marshal.ReadInt32(lParam);
        Console.WriteLine((Keys)vkCode);
    }
    return -1;
}

This isn't nice but it's working. Be careful with this!