added support for handled events

[bergi9]

Sample code:

rawInput.KeyPressed += (sender, e) => {
    if(/*some condition*/)
    {
        e.KeyPressEvent.Handled = true;
    }
};

[stevemesser]

I tried your code with the following example:

_rawinput.KeyPressed += (sender, e) =>
{
if (e.KeyPressEvent.VKeyName == "H")
{
e.KeyPressEvent.Handled = true;
}
};

If I press H on the keyboard it still shows up in the textbox. It doesn't appear that the H key stroke is handled at all.

Am I missing something?

[stevemesser]

However, if I modify the PreMessage filter as follows:

public class PreMessageFilter : IMessageFilter
{
// true to filter the message and stop it from being dispatched
// false to allow the message to continue to the next filter or control.
public bool PreFilterMessage(ref Message m)
{
Keys latestKey = (Keys)m.WParam.ToInt64();
Console.WriteLine("Key Pressed: " + latestKey);

    if (m.Msg == Win32.WM_KEYDOWN && latestKey == Keys.H) return true;

    return false;

    //return m.Msg == Win32.WM_KEYDOWN; // This was just an example to filter all keydown presses
}

}

Then the H doesn't appear in the TextBox.

[bergi9]

I don't use the PreMessageFilter because I'm using WPF.

[stevemesser]

Oh, I don't have a WPF example anymore.

[FracturedSolace]

So does this simply keep key-presses from showing up in the Application window or is it global? I've been looking for/trying to work out a method to block keystrokes from a secondary keyboard globally.

As far as I can tell, it seems like WM_INPUT is firing after the targetted window receives the keypress, and I don't know of any way to work around this? This library https://github.com/gmamaladze/globalmousekeyhook allows for global key suppression, but THEIR method doesn't allow you to get a device ID.

Any thoughts?

[Hoopou]

none of this works when you are not in foreground right?