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Graphics.DrawBezier Method (Pen, PointF, PointF, PointF, PointF)

Draws a Bézier spline defined by four PointF structures.

Namespace:  System.Drawing
Assembly:  System.Drawing (in System.Drawing.dll)

public void DrawBezier(
	Pen pen,
	PointF pt1,
	PointF pt2,
	PointF pt3,
	PointF pt4


Type: System.Drawing.Pen

Pen that determines the color, width, and style of the curve.

Type: System.Drawing.PointF

PointF structure that represents the starting point of the curve.

Type: System.Drawing.PointF

PointF structure that represents the first control point for the curve.

Type: System.Drawing.PointF

PointF structure that represents the second control point for the curve.

Type: System.Drawing.PointF

PointF structure that represents the ending point of the curve.


pen is null.

The Bézier spline is drawn from the first point to the fourth point. The second and third points are control points that determine the shape of the curve.

The following code example is designed for use with Windows Forms, and it requires PaintEventArgs e, which is a parameter of the Paint event handler. The code performs the following actions:

  • Creates a black pen.

  • Creates the start, end, and two control points for the curve.

  • Draws the Bézier curve to the screen.

private void DrawBezierPointF(PaintEventArgs e)
    // Create pen.
    Pen blackPen = new Pen(Color.Black, 3);

    // Create points for curve.
    PointF start = new PointF(100.0F, 100.0F);
    PointF control1 = new PointF(200.0F, 10.0F);
    PointF control2 = new PointF(350.0F, 50.0F);
    PointF end = new PointF(500.0F, 100.0F);

    // Draw arc to screen.
    e.Graphics.DrawBezier(blackPen, start, control1, control2, end);

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0