Keyboard hook get key combination (WPF)

Question

I tried using this post here: Using global keyboard hook (WH_KEYBOARD_LL) in WPF / C# And i have this sucessfully working.

But there is something i cant get my finger be

Answer 1

To ensure that the key combination is actually pressed by the user, you have to check the state of both key and thus you have to keep track of their state.

An approach can be :

List keys = new List();

void KListener_KeyDown(object sender, RawKeyEventArgs args)
{
   SetKeyDown(args.key);

   if(IsKeyDown(Key.LeftCtrl) && IsKeyDown(Key.C))
       MessageBox.Show("Woot!");
}

void KListener_KeyUp(object sender, RawKeyEventArgs args)
{
    SetKeyUp(args.key);
}

private bool IsKeyDown(Key key)
{
    return keys.Contains(key);
}

private void SetKeyDown(Key key)
{
    if(!keys.Contains(key)) 
        keys.Add(key);
}

private void SetKeyUp(Key key)
{
    if(keys.Contains(key)) 
        keys.Remove(key);
}