Drawing Full Screen Crosshairs in C#

[EDN Admin]

<p style="margin:0in; font-family:Verdana; font-size:11pt I would like to draw a full-screen crosshairs cursor on a chart that has a lot of information. I have tried some solutions that have been suggested in another thread but they are a bit slow. The crosshairs
follows the cursor with a time lag. Any help would be appreciated?
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<p style="margin:0in; font-family:Verdana; font-size:11pt Thank you.
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<p style="margin:0in; font-family:Verdana; font-size:11pt Here is the basic drawing code. Im using ZedGraphControl to draw the chart.
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<p style="margin:0in; font-family:Verdana; font-size:11pt public partial class Form1 : Form
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public static ZedGraphControl zedGraphControl1 = new ZedGraphControl();
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int mouseX = 0;
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int mouseY = 0;
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private bool ZedGraph_MouseMove(ZedGraphControl sender, MouseEventArgs e)
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{
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sender.Refresh();
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Pen blackPen = new Pen(Color.Black, 1);
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Graphics g = sender.CreateGraphics();
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// Get the coordinates that define crosshairs.
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float formLeft = this.Left;
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float formTop = this.Top ;
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float formRight = this.Right ;
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float formBottom = this.Bottom ;
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mouseX = e.X ;
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mouseY = e.Y ;
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// Draw line on screen.
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g.DrawLine(blackPen,0,mouseY,mouseX,mouseY );
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g.DrawLine(blackPen, mouseX, 0, mouseX,mouseY);
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g.DrawLine(blackPen, formRight, mouseY, mouseX, mouseY);
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g.DrawLine(blackPen, mouseX, formBottom,mouseX, mouseY);
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<p style="margin:0in 0in 0in 0.375in; font-family:Verdana; font-size:11pt // A bool return value is required by ZedGraphControl.ZedMouseEventHandler.
<p style="margin:0in 0in 0in 0.375in; font-family:Verdana; font-size:11pt return false;
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}
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