' 导入命名空间
Imports System.Drawing.Text
Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms

public class PathGradientBrushQuadPoints
   public Shared Sub Main
        Application.Run(New PathGradientBrushesForm)
   End Sub
End class

Public Class PathGradientBrushesForm
    Inherits System.Windows.Forms.Form

#Region " Windows Form Designer generated code "

    Public Sub New()
        MyBase.New()

        'This call is required by the Windows Form Designer.
        InitializeComponent()

        'Add any initialization after the InitializeComponent() call

    End Sub

    'Form overrides dispose to clean up the component list.
    Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
        If disposing Then
            If Not (components Is Nothing) Then
                components.Dispose()
            End If
        End If
        MyBase.Dispose(disposing)
    End Sub

    'Required by the Windows Form Designer
    Private components As System.ComponentModel.IContainer

    'NOTE: The following procedure is required by the Windows Form Designer
    'It can be modified using the Windows Form Designer.  
    'Do not modify it using the code editor.
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        components = New System.ComponentModel.Container()
        Me.Text = "PathGradientBrushesForm"
    End Sub

#End Region


    Private Sub PathGradientBrushesForm_Paint(ByVal sender As Object, ByVal e As PaintEventArgs) Handles MyBase.Paint
        Dim g As Graphics = e.Graphics
        Dim width As Integer = Me.ClientRectangle.Width / 2
        Dim height As Integer = Me.ClientRectangle.Height / 2

        Dim b As PathGradientBrush
        Dim x As Integer = 0
        Dim y As Integer = 0

        Dim quadPoints As Point() = New Point() {New Point(0, 0), New Point(width, 0), New Point(width, height), New Point(0, height)}
        b = New PathGradientBrush(quadPoints)
        b.WrapMode = WrapMode.Tile
        g.FillRectangle(b, x, y, width, height)
    End Sub

End Class