How to disable click through in a transparent windows form c#

Question

I am making a music player app in windows form and i made a gaming mode in which the form ins transparent but the problem is i can click through the form

public Form2()
        {
            InitializeComponent();
            this.BackColor = Color.DarkGray;
            this.TransparencyKey = Color.DarkGray;
        }

this the code i used to make the form transparent but it click through the form

How i can disable (I mean remove) the click through

It whould be really helpful if you reply