Electron Theme by AeonHack, converted by Chuiby

//Electron Theme
public class ETheme : Control
{
    private int _TitleHeight = 25;
    public int TitleHeight
    {
        get
        {
            return _TitleHeight;
        }
        set
        {
            if (value > Height)
            {
                value = Height;
            }
            if (value < 2)
            {
                Height = 1;
            }
            _TitleHeight = value;
            Invalidate();
        }
    }
    private HorizontalAlignment _TitleAlign = (HorizontalAlignment)2;
    public HorizontalAlignment TitleAlign
    {
        get
        {
            return _TitleAlign;
        }
        set
        {
            _TitleAlign = value;
            Invalidate();
        }
    }
    protected override void OnHandleCreated(System.EventArgs e)
    {
        Dock = (DockStyle)5;
        if (Parent is Form)
        {
            ((Form)Parent).FormBorderStyle = 0;
        }
        base.OnHandleCreated(e);
    }
    protected override void OnMouseDown(System.Windows.Forms.MouseEventArgs e)
    {
        if (new Rectangle(Parent.Location.X, Parent.Location.Y, Width - 1, _TitleHeight - 1).IntersectsWith(new Rectangle(MousePosition.X, MousePosition.Y, 1, 1)))
        {
            Capture = false;
            var M = Message.Create(Parent.Handle, 161, new IntPtr(2), new IntPtr(0));
            DefWndProc(ref M);
        }
        base.OnMouseDown(e);
    }
    private Color C1 = Color.FromArgb(0, 70, 114);
    private Color C2 = Color.FromArgb(0, 47, 78);
    private Color C3 = Color.FromArgb(0, 34, 57);
    private Color C4 = Color.FromArgb(0, 30, 50);
    protected override void OnPaintBackground(System.Windows.Forms.PaintEventArgs pevent)
    {
    }
    protected override void OnPaint(System.Windows.Forms.PaintEventArgs e)
    {
        using (Bitmap B = new Bitmap(Width, Height))
        {
            using (var G = Graphics.FromImage(B))
            {
                G.Clear(C3);

                Draw.Blend(G, C2, C3, C1, 0.5F, 1, 0, 0, Width, _TitleHeight);

                G.FillRectangle(new SolidBrush(Color.FromArgb(15, 255, 255, 255)), 1, 1, Width - 2, System.Convert.ToInt32(_TitleHeight / 2.0) - 2);
                G.DrawRectangle(new Pen(Color.FromArgb(35, 255, 255, 255)), 1, 1, Width - 3, _TitleHeight - 2);

                var S = G.MeasureString(Text, Font);
                var O = 6;
                if ((int)_TitleAlign == 2)
                {
                    O = Width / 2 - (int)S.Width / 2;
                }
                if ((int)_TitleAlign == 1)
                {
                    O = Width - (int)S.Width - 14;
                }
                var V = System.Convert.ToInt32(_TitleHeight / 2.0 - (S.Height + 4) / 2);

                Draw.Gradient(G, C3, C2, O, V, (int)S.Width + 8, (int)S.Height + 4);
                G.DrawRectangle(new Pen(C3), O, V, S.Width + 7, S.Height + 3);

                Rectangle R = new Rectangle(O + 4, System.Convert.ToInt32(_TitleHeight / 2 - S.Height / 2), (int)S.Width, (int)S.Height);
                using (LinearGradientBrush T = new LinearGradientBrush(R, C1, C2, LinearGradientMode.Vertical))
                {
                    G.DrawString(Text, Font, T, R);
                }

                G.DrawRectangle(new Pen(C1), 1, _TitleHeight + 1, Width - 3, Height - _TitleHeight - 3);

                G.DrawLine(new Pen(C4), 0, _TitleHeight, Width, _TitleHeight);
                G.DrawRectangle(new Pen(C4), 0, 0, Width - 1, Height - 1);
                e.Graphics.DrawImage((Image)B.Clone(), 0, 0);
            }
        }
    }
}