TemplateScreen4.cs
-----------------------------

using ScitechGUI;
using SharpDX;
using SharpDX.Toolkit;
using SharpDX.Toolkit.Content;
using SharpDX.Toolkit.Graphics;


namespace TestTemplate
{
    public class TemplateScreen4 : Screen
    {
        Button startButton;

        public TemplateScreen4(Screen baseScreen, GraphicsDevice gDevice, ContentManager cManager, AssetManager aManager, SpriteBatch sBatch)
            : base()
        {
            this.GraphicsDevice = gDevice;
            this.content = cManager;
            this.assetManager = aManager;
            this.spriteBatch = sBatch;

            foreach (ScitechGUI.DrawableComponent c in baseScreen.components)
            {
                components.Add(c);
            }
        }

        public override void Initialize()
        {
            base.Initialize();

            startButton = controlByName(@"StartButton") as Button;
            startButton.OnMouseDown += StartButton_OnMouseDown;
        }

        private void StartButton_OnMouseDown(object sender, ControlEventArgs e)
        {
            DoThing();
        }

        public override void Draw(GameTime gameTime)
        {
            base.Draw(gameTime);
        }

        public void DoThing()
        {
            System.Windows.Forms.MessageBox.Show("Do thing!");
        }
    }
}


Game1.cs
------------------------

assetManager.LoadAssets(@"Content\Screen4Assets.xml", @"Content\");
            Screen tempScreen = Screen.Load(@"Content\Screen4.xml", GraphicsDevice, assetManager, spriteBatch);
            screen4 = new TemplateScreen4(tempScreen, GraphicsDevice, Content, assetManager, spriteBatch);
            screen4.Initialize();
            screen4.Enabled = false;
            screen4.Visible = false;
            tempScreen = screen4 as Screen;
            defaultGUIRenderer.AddScreen(ref tempScreen);