C# 隐形窗体 示例源码(没有边框，没有标题栏)

using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Drawing.Drawing2D;using System.Linq;using System.Text;using System.Threading.Tasks;using System.Windows.Forms;namespace 掌上川电其他窗体_UI{ public partial class Form2 : Form { public Form2() { InitializeComponent(); MouseDown = new MouseEventHandler(OnMouseDown); MouseMove = new MouseEventHandler(OnMouseMove); } protected override void OnLoad(EventArgs e) { dat.Add(new PointF(0, 0)); dat.Add(new PointF(Width, Height / 2)); dat.Add(new PointF(Width / 2, Height)); } List<PointF> dat = new List<PointF>(); protected override void OnPaint(PaintEventArgs e) { base.OnPaint(e); //SendToBack(); BringToFront(); Graphics g = e.Graphics; g.SmoothingMode = SmoothingMode.AntiAlias; using (var path = new GraphicsPath()) { path.AddLines(dat.ToArray()); g.DrawPath(Pens.Red, path); path.Widen(new Pen(Color.Green, 1)); Region = new Region(path); } } int ox, oy; void OnMouseDown(object sender, MouseEventArgs e) { ox = e.X; oy = e.Y; BringToFront(); } void OnMouseMove(object sender, MouseEventArgs e) { Cursor = Cursors.Hand; if (e.Button == MouseButtons.Left) { Top = e.Y - oy; Left = e.X - ox; } } private void Form2_Load(object sender, EventArgs e) { } }}