Dim linGrBrush As New LinearGradientBrush( _
   New Point(0, 10), _
   New Point(200, 10), _
   Color.FromArgb(255, 255, 0, 0), _
   Color.FromArgb(255, 0, 0, 255))
Dim pen As New Pen(linGrBrush)

e.Graphics.DrawLine(pen, 0, 10, 200, 10)
e.Graphics.FillEllipse(linGrBrush, 0, 30, 200, 100)
e.Graphics.FillRectangle(linGrBrush, 0, 155, 500, 30)

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

public class ColorBlending
   public Shared Sub Main
        Application.Run(New Form1)
   End Sub
End class

public class Form1
  Inherits System.Windows.Forms.Form

  Protected Overrides Sub OnPaint(ByVal e As PaintEventArgs)
        Dim g As Graphics = Me.CreateGraphics()
        g.Clear(Me.BackColor)

        Dim rgBrush As New LinearGradientBrush(New RectangleF(20, 20, 100, 100), Color.Red, Color.Green, LinearGradientMode.Horizontal)
        Dim yrBrush As New LinearGradientBrush(New RectangleF(140, 20, 150, 300), Color.Yellow, Color.Red, LinearGradientMode.ForwardDiagonal)
        Dim rbBrush As New LinearGradientBrush(New RectangleF(10, 10, 50, 50), Color.Red, Color.Blue, LinearGradientMode.ForwardDiagonal)

        g.FillRectangle(rgBrush, 20, 20, 100, 100)
        g.FillEllipse(yrBrush, 140, 20, 200, 200)
        g.DrawString("Color Blending", New Font("Tahoma", 30), rbBrush, New RectangleF(100, 240, 300, 300))


        ' Dispose
        g.Dispose()

  End Sub

  Public Sub New()
   
    MyBase.New()
    Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
    Me.ClientSize = New System.Drawing.Size(292, 273)
    Me.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen

  End Sub

End Class