C# Forms - Custom Popup InputBox

[bixel]

I've created a custom popup input box (much like the one from VB). It saves the string that has been inputed. Most of the code has been imported from here >>

http://www.csharp-examples.net/inputbox/

I want to add a Enter key functionality, in-order to speed up the process since the user will be using this box a lot.

        private void EnterKey(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.Enter) 
            {
                InputResponse = this.txtInput.Text;
                this.Close();
            }
        }

Since the custom Input box is created on the fly - I can't simply right click its object and add the event. It needs to be done in code. But I am not able to get it correct.

            //
            // txtInput
            //
            this.txtInput.Location = new System.Drawing.Point(10, 36);
            this.txtInput.Name = "txtInput";
            this.txtInput.Size = new System.Drawing.Size(200, 20);
            this.txtInput.TabIndex = 0;
            this.txtInput.Text = "";
            this.txtInput.??? += new System.EventHandler(this.EnterKey);
            //

I've tried this.txtInput.TextChanged -- but the error is

No overload for 'EnterKey' matches delegate 'System.EventHandler'

dunno what to do here.