How do i use big messages?

[M8T]

i was trying to mess with this https://github.com/Guad/NativeUI/blob/master/NativeUI/BigMessage.cs and tried to make something but nothing shows up on my screen when testing i know i did something wrong as i never done this before and was hoping someone could help me Heres what i did.
private void onKeyDown(object sender, KeyEventArgs e)
{
if (e.KeyCode == Keys.K)
{

            ShowMissionPassedMessage("Test");

        }
    }

[JohnFromGWN]

@M8T nativeui is no longer supported so you might want to consider LemonUI which also supports the big message and has code examples on github. They also have an active discord server hosted by the author.

[JohnFromGWN]

@JohnFromGWN https://github.com/justalemon/LemonUI/blob/59d6098081ea475bab356f6620e542d69f86b642/LemonUI/Scaleform/BigMessage.cs