Graphics g=this.lable1.CreatGraphics();
Pen mypen=new Pen(Color.Blue,5);
g.DrawEillipse(mypen,1,1,80,40);

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用這個吧
http://www.yworks.com

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直接用Graphics在Form上或者控件上画就可以了.


// This example creates a PictureBox control on the form and draws to it.
// This example assumes that the Form_Load event handler method is
// connected to the Load event of the form.

private PictureBox pictureBox1 = new PictureBox();
private void Form1_Load(object sender, System.EventArgs e)
{
   // Dock the PictureBox to the form and set its background to white.
   pictureBox1.Dock = DockStyle.Fill;
   pictureBox1.BackColor = Color.White;
   // Connect the Paint event of the PictureBox to the event handler method.
   pictureBox1.Paint += new System.Windows.Forms.PaintEventHandler(this.pictureBox1_Paint);

   // Add the PictureBox control to the Form.
   this.Controls.Add(pictureBox1);
}

private void pictureBox1_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
{
   // Create a local version of the graphics object for the PictureBox.
   Graphics g = e.Graphics;

   // Draw a string on the PictureBox.
   g.DrawString("This is a diagonal line drawn on the control",
       new Font("Arial",10), System.Drawing.Brushes.Blue, new Point(30,30));
   // Draw a line in the PictureBox.
   g.DrawLine(System.Drawing.Pens.Red, pictureBox1.Left, pictureBox1.Top,
       pictureBox1.Right, pictureBox1.Bottom);
}


来自:
http://msdn.microsoft.com/en-us/library/system.windows.forms.control.paint.aspx

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探讨


没有窗体，也可以吗？谢谢引用:



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直接获取label的handle，用graphic绘图就行

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GDI,或者第三方控件