The color gradient is a smooth shading of colors from the center point of the path to the outside boundary edge of the path. Blend factors, positions, and style affect where the gradient starts and ends, and how fast it changes shade.

Path gradient brushes do not obey the SmoothingMode property of the Graphics object used to do the drawing. Areas filled using a PathGradientBrush object are rendered the same way (aliased) regardless of the smoothing mode.

The following code example shows how to create a PathGradientBrush. This example is designed for use with Windows Forms, and it requires the PaintEventArgs e, which is a parameter of PaintEventHandler.

        ' Create a path that consists of a single ellipse.
        Dim path As New GraphicsPath()
        path.AddEllipse(0, 0, 140, 70)

        ' Use the path to construct a brush.
        Dim pthGrBrush As New PathGradientBrush(path)

        ' Set the color at the center of the path to blue.
        pthGrBrush.CenterColor = Color.FromArgb(255, 0, 0, 255)

        ' Set the color along the entire boundary 
        ' of the path to aqua.
        Dim colors As Color() = {Color.FromArgb(255, 0, 255, 255)}
        pthGrBrush.SurroundColors = colors

        e.Graphics.FillEllipse(pthGrBrush, 0, 0, 140, 70)

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role not supported), Windows Server 2003 SP2

.NET Framework

.NET Framework Client Profile

Reference

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