Winform自定义Button控件

public partial class CircleTool : UserControl
    {
        [Browsable(true)]
        [Description("边框主题色"), Category("自定义属性")]//DefaultValue("属性默认值，重置时使用")
        public Color FrameColor 
        {
            get { return this.BackColor; }
            set { this.BackColor = value; }
        }
        [Browsable(true)]
        [Description("圆的直径"), Category("自定义属性")]
        public int CircleRadius
        {
            get { return this.lb_cir.Height > this.lb_cir.Width ? this.lb_cir.Width : this.lb_cir.Height; }
            set {
                this.lb_cir.Height = value;
                this.lb_cir.Width = value;
            }
        }
        [Browsable(true)]
        [Description("圆的开始位置坐标"), Category("自定义属性")]
        public Point CircleLocation
        {
            get { return this.lb_cir.Location; }
            set
            {
                this.lb_cir.Location = value;
            }
        }

        [Browsable(true)]
        [Description("圆的颜色"), Category("自定义属性")]
        public Color CircleColor
        {
            get { return _circleColor; }
            set
            {
                this._circleColor = value;
            }
        }

        [Browsable(true)]
        [Description("控件标题"), Category("自定义属性")]
        public string CircleTitle
        {
            get { return this.lb_title.Text; }
            set
            {
                this.lb_title.Text = value;
            }
        }

        [Browsable(true)]
        [Description("控件标题高度"), Category("自定义属性")]
        public Size CircleTitleHeight
        {
            get { return this.lb_title.Size; }
            set
            {
                this.lb_title.Size = value;
            }
        }

        [Browsable(true)]
        [Description("圆形中的图像"), Category("自定义属性")]
        public Image CircleImage
        {
            get { return this.lb_cir.Image; }
            set
            {
                this.lb_cir.Image = value;
            }
        }


        [Browsable(true)]
        [Description("圆点击事件"), Category("自定义属性")]
        public event EventHandler BtnTestClick;


        private Color _circleColor = Color.Green;
        public CircleTool()
        {
            InitializeComponent();
        }

        private void lb_cir_Paint(object sender, PaintEventArgs e)
        {
            try 
            {
                Graphics grapics = e.Graphics;
                grapics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
                Brush bush = new SolidBrush(_circleColor);//填充的颜色
                int radius = this.lb_cir.Height > this.lb_cir.Width ? this.lb_cir.Width : this.lb_cir.Height;
                grapics.FillEllipse(bush, 0, 0, radius, radius);//画填充椭圆的方法，x坐标、y坐标、宽、高，如果是100，则半径为50
                Image image = this.lb_cir.Image;//global::Testdelegate.Properties.Resources.官方版本;
                //Rect rect = new Ract()
                int inmagestart_x = radius / 2 - image.Width / 2;
                int inmagestart_y = radius / 2 - image.Height / 2;
                grapics.DrawImage(image, inmagestart_x, inmagestart_y, image.Width, image.Height);
            }
            catch { }
           
        }

        private void lb_cir_Click(object sender, EventArgs e)
        {
            try { BtnTestClick(sender, e); }
            catch { }
            
        }

        private void lb_title_Click(object sender, EventArgs e)
        {
            try { BtnTestClick(sender, e); }
            catch { }
        }
        private void lb_cir_MouseLeave(object sender, EventArgs e)
        {
            this.Cursor = Cursors.Default; 
        }

        private void lb_cir_MouseMove(object sender, MouseEventArgs e)
        {
            this.Cursor = Cursors.Hand;  
        }
    }

效果：