VB.Net by API/System.Drawing.Drawing2D/ColorBlend

ColorBlend.Colors

  

Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
public class PathGBInterPol
   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 clrArray As Color() = {Color.Red, Color.Blue, Color.Green, Color.Pink, Color.Yellow, Color.DarkTurquoise}
        Dim posArray As Single() = {0.0F, 0.2F, 0.4F, 0.6F, 0.8F, 1.0F}
        Dim colorBlend As New ColorBlend
        colorBlend.Colors = clrArray
        colorBlend.Positions = posArray
        g.SmoothingMode = SmoothingMode.AntiAlias
        Dim path As New GraphicsPath
        Dim rect As New Rectangle(10, 20, 200, 200)
        path.AddRectangle(rect)
        Dim rgBrush As New PathGradientBrush(path)
        rgBrush.InterpolationColors = colorBlend
        rgBrush.FocusScales = New PointF(0.6F, 0.2F)
        Dim colors() As Color = {Color.Green}
        rgBrush.CenterColor = Color.Red
        rgBrush.SurroundColors = colors
        g.FillEllipse(rgBrush, rect)
        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

ColorBlend.Positions

  

Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
public class PathGBInterPol
   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 clrArray As Color() = {Color.Red, Color.Blue, Color.Green, Color.Pink, Color.Yellow, Color.DarkTurquoise}
        Dim posArray As Single() = {0.0F, 0.2F, 0.4F, 0.6F, 0.8F, 1.0F}
        Dim colorBlend As New ColorBlend
        colorBlend.Colors = clrArray
        colorBlend.Positions = posArray
        g.SmoothingMode = SmoothingMode.AntiAlias
        Dim path As New GraphicsPath
        Dim rect As New Rectangle(10, 20, 200, 200)
        path.AddRectangle(rect)
        Dim rgBrush As New PathGradientBrush(path)
        rgBrush.InterpolationColors = colorBlend
        rgBrush.FocusScales = New PointF(0.6F, 0.2F)
        Dim colors() As Color = {Color.Green}
        rgBrush.CenterColor = Color.Red
        rgBrush.SurroundColors = colors
        g.FillEllipse(rgBrush, rect)
        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