本实例通过继承 Button按钮，重写OnPaint事件重新绘制。
为增强效果，可以构造函数中this.Cursor = Cursors.Hand; 将鼠标形状改成手势。
效果图如下所示：
第一步：重写 OnPaint事件
private bool mouseover = false;
protected override void OnPaint(System.Windows.Forms.PaintEventArgs e)
{
Color c5 = Color.FromA#ffffff;
Color c2 = Color.FromA#c0c0c0;
if (mouseover)
{
c5 = Color.FromA#f5f5f5;
c2 = Color.FromA#b4afbe;
}
Brush b = new System.Drawing.Drawing2D.LinearGradientBrush(ClientRectangle, c5, c2, LinearGradientMode.Vertical);
int offsetwidth = this.Width / 50;
Point[] points = new Point[8];
points[0].X = offsetwidth;
points[0].Y = 0;
points[1].X = this.Width - offsetwidth;
points[1].Y = 0;
points[2].X = this.Width;
points[2].Y = offsetwidth;
points[3].X = this.Width;
points[3].Y = this.Height - offsetwidth;
points[4].X = this.Width - offsetwidth;
points[4].Y = this.Height;
points[5].X = offsetwidth;
points[5].Y = this.Height;
points[6].X = 0;
points[6].Y = this.Height - offsetwidth;
points[7].X = 0;
points[7].Y = offsetwidth;
e.Graphics.FillPolygon(b, points, FillMode.Winding);
int offsetwidth1 = (this.Width - 5) / 50 + 2;
Point[] points1 = new Point[8];
points1[0].X = offsetwidth1;
points1[0].Y = 2;
points1[1].X = this.Width - offsetwidth1;
points1[1].Y = 2;
points1[2].X = this.Width - 1;
points1[2].Y = offsetwidth1;
points1[3].X = this.Width - 1;
points1[3].Y = this.Height - offsetwidth1;
points1[4].X = this.Width - offsetwidth1;
points1[4].Y = this.Height - 1;
points1[5].X = 1;
points1[5].Y = this.Height - 1;
points1[6].X = 2;
points1[6].Y = this.Height - offsetwidth1;
points1[7].X = 2;
points1[7].Y = offsetwidth1;
Pen p = new Pen(Color.Orange, 2);
Pen p1 = new Pen(Color.Wheat, 2);
e.Graphics.DrawLine(p1, points1[0], points1[1]);
e.Graphics.DrawLine(p, points1[1], points1[2]);
e.Graphics.DrawLine(p, points1[2], points1[3]);
e.Graphics.DrawLine(p, points1[3], points1[4]);
e.Graphics.DrawLine(p, points1[4], points1[5]);
e.Graphics.DrawLine(p, points1[5], points1[6]);
e.Graphics.DrawLine(p1, points1[6], points1[7]);
e.Graphics.DrawLine(p1, points1[7], points1[0]);
e.Graphics.DrawPolygon(new Pen(Color.DarkBlue, 2), points);
StringFormat drawFormat = new StringFormat();
drawFormat.FormatFlags = StringFormatFlags.DisplayFormatControl;
drawFormat.LineAlignment = StringAlignment.Center;
drawFormat.Alignment = System.Drawing.StringAlignment.Center;
e.Graphics.DrawString(this.Text, this.Font, new LinearGradientBrush(this.ClientRectangle, Color.Black, Color.Black, LinearGradientMode.Vertical), this.ClientRectangle, drawFormat);
b.Dispose();
}
第二步：重写鼠标移入事件
第三步：重写鼠标移出事件
提示：可以将Color c5 和Color c2 改成自己想要的颜色，也可写成属性让用户选择，会产生不一样的效果哦！
完整代码：
//控件名：myXPButton
//作者：刘典武
//时间：2011-06-02
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Text;
using System.Windows.Forms;
using System.Drawing.Drawing2D;
namespace myControl
{
public partial class myXPButton : Button
{
public myXPButton()
{
this.Cursor = Cursors.Hand;
}
private bool mouseover = false;
protected override void OnPaint(System.Windows.Forms.PaintEventArgs e)
{
Color c5 = Color.FromA#ffffff;//按钮表面上部颜色
Color c2 = Color.FromA#c0c0c0;//按钮表面下部颜色
if (mouseover)//鼠标移入的话重新改变
{
c5 = Color.FromA#f5f5f5;
c2 = Color.FromA#b4afbe;
}
Brush b = new System.Drawing.Drawing2D.LinearGradientBrush(ClientRectangle, c5, c2, LinearGradientMode.Vertical);
int offsetwidth = this.Width / 50;
Point[] points = new Point[8];
points[0].X = offsetwidth;
points[0].Y = 0;
points[1].X = this.Width - offsetwidth;
points[1].Y = 0;
points[2].X = this.Width;
points[2].Y = offsetwidth;
points[3].X = this.Width;
points[3].Y = this.Height - offsetwidth;
points[4].X = this.Width - offsetwidth;
points[4].Y = this.Height;
points[5].X = offsetwidth;
points[5].Y = this.Height;
points[6].X = 0;
points[6].Y = this.Height - offsetwidth;
points[7].X = 0;
points[7].Y = offsetwidth;
e.Graphics.FillPolygon(b, points, FillMode.Winding);
int offsetwidth1 = (this.Width - 5) / 50 + 2;
Point[] points1 = new Point[8];
points1[0].X = offsetwidth1;
points1[0].Y = 2;
points1[1].X = this.Width - offsetwidth1;
points1[1].Y = 2;
points1[2].X = this.Width - 1;
points1[2].Y = offsetwidth1;
points1[3].X = this.Width - 1;
points1[3].Y = this.Height - offsetwidth1;
points1[4].X = this.Width - offsetwidth1;
points1[4].Y = this.Height - 1;
points1[5].X = 1;
points1[5].Y = this.Height - 1;
points1[6].X = 2;
points1[6].Y = this.Height - offsetwidth1;
points1[7].X = 2;
points1[7].Y = offsetwidth1;
Pen p = new Pen(Color.Orange, 2);
Pen p1 = new Pen(Color.Wheat, 2);
e.Graphics.DrawLine(p1, points1[0], points1[1]);
e.Graphics.DrawLine(p, points1[1], points1[2]);
e.Graphics.DrawLine(p, points1[2], points1[3]);
e.Graphics.DrawLine(p, points1[3], points1[4]);
e.Graphics.DrawLine(p, points1[4], points1[5]);
e.Graphics.DrawLine(p, points1[5], points1[6]);
e.Graphics.DrawLine(p1, points1[6], points1[7]);
e.Graphics.DrawLine(p1, points1[7], points1[0]);
e.Graphics.DrawPolygon(new Pen(Color.DarkBlue, 2), points);
StringFormat drawFormat = new StringFormat();
drawFormat.FormatFlags = StringFormatFlags.DisplayFormatControl;
drawFormat.LineAlignment = StringAlignment.Center;
drawFormat.Alignment = System.Drawing.StringAlignment.Center;
e.Graphics.DrawString(this.Text, this.Font, new LinearGradientBrush(this.ClientRectangle, Color.Black, Color.Black, LinearGradientMode.Vertical), this.ClientRectangle, drawFormat);
b.Dispose();
}
protected override void OnMouseEnter(EventArgs e)
{
mouseover = true;
this.Invalidate(false);
base.OnMouseEnter(e);
}
protected override void OnMouseLeave(EventArgs e)
{
mouseover = false;
this.Invalidate(false);
base.OnMouseLeave(e);
}
}
}