椭圆开窗体
using System;
using System.Drawing;
using System.Windows.Forms;
class EllipseClass:Form
{
private Rectangle ellipseBounds=new Rectangle(new Point(0,0),new Size(100,50));
private Brush solidAzureBrush=Brushes.Yellow;
private Point m_pOffset=new Point(0,0); public EllipseClass()
{
this.Text="不规则图形";
this.StartPosition=FormStartPosition.CenterScreen;
this.BackColor=Color.Red;
this.FormBorderStyle=FormBorderStyle.None;
this.TransparencyKey = Color.Red;
} protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
Graphics dc=e.Graphics;
dc.FillEllipse(solidAzureBrush,ellipseBounds);
} protected override void OnMouseDown(MouseEventArgs e)
{
base.OnMouseDown(e);
m_pOffset=new Point(e.X,e.Y);
//Console.WriteLine("Down X:{0} ,Y:{1}",m_pOffset.X,m_pOffset.Y);
} protected override void OnMouseMove(MouseEventArgs e)
{
base.OnMouseMove(e);
if(e.Button == MouseButtons.Left)
{
Point mousePos = Control.MousePosition;
//Console.WriteLine("Move X:{0} ,Y:{1}",mousePos.X,mousePos.Y);
this.Location =new Point( mousePos.X-m_pOffset.X,mousePos.Y-m_pOffset.Y);
//Console.WriteLine("Location X:{0} ,Y:{1}",this.Location.X,this.Location.Y);
}
}
public static void Main()
{
Application.Run(new EllipseClass());
}
}
