VB.Net/2D/Gradient

Fill an ellipse setting CenterColor and SurroundColors

 
Imports System.Drawing.Drawing2D
Imports System
Imports System.Drawing.Text
Imports System.Drawing
Imports System.Windows.Forms
Imports System.Math
Public Class MainClass
   Shared Sub Main()
       Dim form1 As Form = New Form1()
       Application.Run(form1)
   End Sub 
End Class
 
Public Class Form1
    Private Sub Form1_Paint(ByVal sender As Object, _
     ByVal e As System.Windows.Forms.PaintEventArgs) Handles Me.Paint
        Dim x As Integer = 10
        Dim y As Integer = 10
        Dim wid As Integer = 100
        Dim hgt As Integer = 50
        " Fill a rectangle.
        Dim rect_pts() As Point = { _
            New Point(x, y), _
            New Point(x + wid, y), _
            New Point(x + wid, y + hgt), _
            New Point(x, y + hgt) _
        }
        Dim path_brush As New PathGradientBrush(rect_pts)
        " Fill an ellipse setting CenterColor and SurroundColors.
        Dim ellipse_path As New GraphicsPath
        ellipse_path.AddEllipse(x, y, wid, hgt)
        path_brush = New PathGradientBrush(ellipse_path)
        path_brush.CenterColor = Color.White
        path_brush.SurroundColors = New Color() {Color.Black}
        e.Graphics.FillEllipse(path_brush, x, y, wid, hgt)
    End Sub
End Class
 
 
<Global.Microsoft.VisualBasic.rupilerServices.DesignerGenerated()> _
Partial Public Class Form1
    Inherits System.Windows.Forms.Form
    "Form overrides dispose to clean up the component list.
    <System.Diagnostics.DebuggerNonUserCode()> _
    Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
        If disposing AndAlso components IsNot Nothing Then
            components.Dispose()
        End If
        MyBase.Dispose(disposing)
    End Sub
    "Required by the Windows Form Designer
    Private components As System.ruponentModel.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()
        Me.SuspendLayout()
        "
        "Form1
        "
        Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
        Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
        Me.ClientSize = New System.Drawing.Size(200, 200)
        Me.Name = "Form1"
        Me.Text = ""
        Me.ResumeLayout(False)
    End Sub
End Class

Fill an ellipse using SetBlendTriangularShape

 
Imports System.Drawing.Drawing2D
Imports System
Imports System.Drawing.Text
Imports System.Drawing
Imports System.Windows.Forms
Imports System.Math
Public Class MainClass
   Shared Sub Main()
       Dim form1 As Form = New Form1()
       Application.Run(form1)
   End Sub 
End Class
 
Public Class Form1
    Private Sub Form1_Paint(ByVal sender As Object, _
     ByVal e As System.Windows.Forms.PaintEventArgs) Handles Me.Paint
        Dim x As Integer = 10
        Dim y As Integer = 10
        Dim wid As Integer = 100
        Dim hgt As Integer = 50
        " Fill a rectangle.
        Dim rect_pts() As Point = { _
            New Point(x, y), _
            New Point(x + wid, y), _
            New Point(x + wid, y + hgt), _
            New Point(x, y + hgt) _
        }
        Dim path_brush As New PathGradientBrush(rect_pts)
        Dim ellipse_path As New GraphicsPath
        " Fill an ellipse using SetBlendTriangularShape.
        ellipse_path = New GraphicsPath
        ellipse_path.AddEllipse(x, y, wid, hgt)
        path_brush = New PathGradientBrush(ellipse_path)
        path_brush.CenterColor = Color.White
        path_brush.SurroundColors = New Color() {Color.Black}
        path_brush.SetBlendTriangularShape(0.5)
        e.Graphics.FillEllipse(path_brush, x, y, wid, hgt)
    End Sub
End Class
 
 
<Global.Microsoft.VisualBasic.rupilerServices.DesignerGenerated()> _
Partial Public Class Form1
    Inherits System.Windows.Forms.Form
    "Form overrides dispose to clean up the component list.
    <System.Diagnostics.DebuggerNonUserCode()> _
    Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
        If disposing AndAlso components IsNot Nothing Then
            components.Dispose()
        End If
        MyBase.Dispose(disposing)
    End Sub
    "Required by the Windows Form Designer
    Private components As System.ruponentModel.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()
        Me.SuspendLayout()
        "
        "Form1
        "
        Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
        Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
        Me.ClientSize = New System.Drawing.Size(200, 200)
        Me.Name = "Form1"
        Me.Text = ""
        Me.ResumeLayout(False)
    End Sub
End Class

Fill an ellipse using SetSigmaBellShape

 
Imports System.Drawing.Drawing2D
Imports System
Imports System.Drawing.Text
Imports System.Drawing
Imports System.Windows.Forms
Imports System.Math
Public Class MainClass
   Shared Sub Main()
       Dim form1 As Form = New Form1()
       Application.Run(form1)
   End Sub 
End Class
 
Public Class Form1
    Private Sub Form1_Paint(ByVal sender As Object, _
     ByVal e As System.Windows.Forms.PaintEventArgs) Handles Me.Paint
        Dim x As Integer = 10
        Dim y As Integer = 10
        Dim wid As Integer = 100
        Dim hgt As Integer = 50
        " Fill a rectangle.
        Dim rect_pts() As Point = { _
            New Point(x, y), _
            New Point(x + wid, y), _
            New Point(x + wid, y + hgt), _
            New Point(x, y + hgt) _
        }
        Dim path_brush As New PathGradientBrush(rect_pts)
        Dim ellipse_path As New GraphicsPath
        " Fill an ellipse using SetSigmaBellShape.
        ellipse_path = New GraphicsPath
        ellipse_path.AddEllipse(x, y, wid, hgt)
        path_brush = New PathGradientBrush(ellipse_path)
        path_brush.CenterColor = Color.White
        path_brush.SurroundColors = New Color() {Color.Black}
        path_brush.SetSigmaBellShape(0.5, 1)
        e.Graphics.FillEllipse(path_brush, x, y, wid, hgt)
    End Sub
End Class
 
 
<Global.Microsoft.VisualBasic.rupilerServices.DesignerGenerated()> _
Partial Public Class Form1
    Inherits System.Windows.Forms.Form
    "Form overrides dispose to clean up the component list.
    <System.Diagnostics.DebuggerNonUserCode()> _
    Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
        If disposing AndAlso components IsNot Nothing Then
            components.Dispose()
        End If
        MyBase.Dispose(disposing)
    End Sub
    "Required by the Windows Form Designer
    Private components As System.ruponentModel.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()
        Me.SuspendLayout()
        "
        "Form1
        "
        Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
        Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
        Me.ClientSize = New System.Drawing.Size(200, 200)
        Me.Name = "Form1"
        Me.Text = ""
        Me.ResumeLayout(False)
    End Sub
End Class

Gradient Paint

  
Imports System.Drawing
Public Class Form1
    Inherits System.Windows.Forms.Form
    Public Sub New()
        MyBase.New()
        Me.SuspendLayout()
        Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
        Me.BackColor = System.Drawing.Color.Gainsboro
        Me.ClientSize = New System.Drawing.Size(400, 182)
        Me.ResumeLayout(False)
    End Sub
    Private Sub Form1_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles MyBase.Paint
        Dim objBrush As New Drawing2D.LinearGradientBrush(Me.DisplayRectangle, Color.Blue, Color.AliceBlue, Drawing2D.LinearGradientMode.Vertical)
        Dim objGraphics As Graphics = Me.CreateGraphics()
        objGraphics.FillRectangle(objBrush, Me.DisplayRectangle)
        objBrush.Dispose()
        objGraphics.Dispose()
    End Sub
End Class

Linear Brush: draw ellipse filled with a blue-yellow gradient

 
Imports System
Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
Imports System.Drawing.Text
Public Class MainClass
   Shared Sub Main()
        Dim myform As Form = New FrmDrawShapes()
        Application.Run(myform)
   End Sub " Main
End Class

Public Class FrmDrawShapes
   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.ruponentModel.Container
   "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()
      "
      "frmDrawShapes
      "
      Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
      Me.ClientSize = New System.Drawing.Size(520, 197)
      Me.Name = "frmDrawShapes"
      Me.Text = "Drawing Shapes"
   End Sub
#End Region
   " draw various shapes on form
   Protected Overrides Sub OnPaint(ByVal e As PaintEventArgs)
      " references to object we will use
      Dim graphicsObject As Graphics = e.Graphics
      " ellipse rectangle and gradient brush
      Dim drawArea1 As Rectangle = New Rectangle(5, 35, 30, 100)
      Dim linearBrush As LinearGradientBrush = _
         New LinearGradientBrush(drawArea1, Color.Blue, _
         Color.Yellow, LinearGradientMode.ForwardDiagonal)
      " draw ellipse filled with a blue-yellow gradient
      graphicsObject.FillEllipse(linearBrush, 5, 30, 65, 100)
   End Sub " OnPaint
End Class

Linear Gradient Brushes: A diagonal brush

 
Imports System.Drawing.Drawing2D
Imports System
Imports System.Drawing.Text
Imports System.Drawing
Imports System.Windows.Forms
Imports System.Math
Public Class MainClass
   Shared Sub Main()
       Dim form1 As Form = New Form1()
       Application.Run(form1)
   End Sub 
End Class
 
 

Public Class Form1
    Private Sub Form1_Paint(ByVal sender As Object, _
     ByVal e As System.Windows.Forms.PaintEventArgs) Handles Me.Paint
        Dim y As Integer = 10
        Dim x As Integer = 10
        Dim wid As Integer = 200
        Dim hgt As Integer = 50
        Dim black_white_brush As New _
            LinearGradientBrush( _
                New Point(x, y), New Point(x + wid, y), _
                Color.Black, Color.White)
        " A diagonal brush.
        wid = hgt
        e.Graphics.DrawString("Diagonal", Me.Font, Brushes.Black, x, y)
        y += 15
        Dim diag_brush As New _
            LinearGradientBrush( _
                New Point(x, y), New Point(x + wid, y + hgt), _
                Color.Black, Color.White)
        e.Graphics.FillRectangle(diag_brush, _
            x, y, wid, hgt)
    End Sub
End Class
 
 
<Global.Microsoft.VisualBasic.rupilerServices.DesignerGenerated()> _
Partial Public Class Form1
    Inherits System.Windows.Forms.Form
    "Form overrides dispose to clean up the component list.
    <System.Diagnostics.DebuggerNonUserCode()> _
    Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
        If disposing AndAlso components IsNot Nothing Then
            components.Dispose()
        End If
        MyBase.Dispose(disposing)
    End Sub
    "Required by the Windows Form Designer
    Private components As System.ruponentModel.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()
        Me.SuspendLayout()
        "
        "Form1
        "
        Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
        Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
        Me.ClientSize = New System.Drawing.Size(800, 400)
        Me.Name = "Form1"
        Me.Text = "TransformArrow"
        Me.ResumeLayout(False)
    End Sub
End Class

Linear Gradient Brushes: Change the brush"s WrapMode

 
Imports System.Drawing.Drawing2D
Imports System
Imports System.Drawing.Text
Imports System.Drawing
Imports System.Windows.Forms
Imports System.Math
Public Class MainClass
   Shared Sub Main()
       Dim form1 As Form = New Form1()
       Application.Run(form1)
   End Sub 
End Class
 
 

Public Class Form1
    Private Sub Form1_Paint(ByVal sender As Object, _
     ByVal e As System.Windows.Forms.PaintEventArgs) Handles Me.Paint
        Dim y As Integer = 10
        Dim x As Integer = 10
        Dim wid As Integer = 200
        Dim hgt As Integer = 50
        Dim black_white_brush As New _
            LinearGradientBrush( _
                New Point(x, y), New Point(x + wid, y), _
                Color.Black, Color.White)
        Dim short_brush As New _
            LinearGradientBrush( _
                New Point(x, y), New Point(x + 50, y), _
                Color.Black, Color.White)
        " Change the brush"s WrapMode.
        e.Graphics.DrawString("WrapMode = TileFlipX", Me.Font, Brushes.Black, x, y)
        y += 15
        short_brush.WrapMode = WrapMode.TileFlipX
        e.Graphics.FillRectangle(short_brush, _
            x, y, wid, hgt)
    End Sub
End Class
 
 
<Global.Microsoft.VisualBasic.rupilerServices.DesignerGenerated()> _
Partial Public Class Form1
    Inherits System.Windows.Forms.Form
    "Form overrides dispose to clean up the component list.
    <System.Diagnostics.DebuggerNonUserCode()> _
    Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
        If disposing AndAlso components IsNot Nothing Then
            components.Dispose()
        End If
        MyBase.Dispose(disposing)
    End Sub
    "Required by the Windows Form Designer
    Private components As System.ruponentModel.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()
        Me.SuspendLayout()
        "
        "Form1
        "
        Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
        Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
        Me.ClientSize = New System.Drawing.Size(800, 400)
        Me.Name = "Form1"
        Me.Text = "TransformArrow"
        Me.ResumeLayout(False)
    End Sub
End Class

Linear Gradient Brushes: Color Blend

 
Imports System.Drawing.Drawing2D
Imports System
Imports System.Drawing.Text
Imports System.Drawing
Imports System.Windows.Forms
Imports System.Math
Public Class MainClass
   Shared Sub Main()
       Dim form1 As Form = New Form1()
       Application.Run(form1)
   End Sub 
End Class
 
 

Public Class Form1
    Private Sub Form1_Paint(ByVal sender As Object, _
     ByVal e As System.Windows.Forms.PaintEventArgs) Handles Me.Paint
        Dim y As Integer = 10
        Dim x As Integer = 10
        Dim wid As Integer = 200
        Dim hgt As Integer = 50
        Dim black_white_brush As New _
            LinearGradientBrush( _
                New Point(x, y), New Point(x + wid, y), _
                Color.Black, Color.White)
        " ColorBlend.
        e.Graphics.DrawString("ColorBlend", Me.Font, Brushes.Black, x, y)
        y += 15
        Dim color_blend As New ColorBlend(3)
        color_blend.Colors = New Color() {Color.Black, Color.White, Color.Black}
        color_blend.Positions = New Single() {0.0, 0.2, 1.0}
        black_white_brush.InterpolationColors = color_blend
        e.Graphics.FillRectangle(black_white_brush, _
            x, y, wid, hgt)
    End Sub
End Class
 
 
<Global.Microsoft.VisualBasic.rupilerServices.DesignerGenerated()> _
Partial Public Class Form1
    Inherits System.Windows.Forms.Form
    "Form overrides dispose to clean up the component list.
    <System.Diagnostics.DebuggerNonUserCode()> _
    Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
        If disposing AndAlso components IsNot Nothing Then
            components.Dispose()
        End If
        MyBase.Dispose(disposing)
    End Sub
    "Required by the Windows Form Designer
    Private components As System.ruponentModel.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()
        Me.SuspendLayout()
        "
        "Form1
        "
        Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
        Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
        Me.ClientSize = New System.Drawing.Size(800, 400)
        Me.Name = "Form1"
        Me.Text = "TransformArrow"
        Me.ResumeLayout(False)
    End Sub
End Class

Linear Gradient Brushes: Make a brush that makes 50 percent of the color change

 
Imports System.Drawing.Drawing2D
Imports System
Imports System.Drawing.Text
Imports System.Drawing
Imports System.Windows.Forms
Imports System.Math
Public Class MainClass
   Shared Sub Main()
       Dim form1 As Form = New Form1()
       Application.Run(form1)
   End Sub 
End Class
 
 

Public Class Form1
    Private Sub Form1_Paint(ByVal sender As Object, _
     ByVal e As System.Windows.Forms.PaintEventArgs) Handles Me.Paint
        Dim y As Integer = 10
        Dim x As Integer = 10
        Dim wid As Integer = 200
        Dim hgt As Integer = 50
        Dim black_white_brush As New _
            LinearGradientBrush( _
                New Point(x, y), New Point(x + wid, y), _
                Color.Black, Color.White)
        " ColorBlend.
        " Make a brush that makes 50 percent of the color change
        " in the first 20 percent of the distance, stays there
        " until 80 percent of the distance, and then finishes
        " in the remaining distance.
        e.Graphics.DrawString("Blend", Me.Font, Brushes.Black, x, y)
        y += 15
        Dim the_blend As New Blend(4)
        the_blend.Factors = New Single() {0.0, 0.5, 0.5, 1.0}
        the_blend.Positions = New Single() {0.0, 0.2, 0.8, 1.0}
        black_white_brush.Blend = the_blend
        e.Graphics.FillRectangle(black_white_brush, _
            x, y, wid, hgt)
    End Sub
End Class
 
 
<Global.Microsoft.VisualBasic.rupilerServices.DesignerGenerated()> _
Partial Public Class Form1
    Inherits System.Windows.Forms.Form
    "Form overrides dispose to clean up the component list.
    <System.Diagnostics.DebuggerNonUserCode()> _
    Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
        If disposing AndAlso components IsNot Nothing Then
            components.Dispose()
        End If
        MyBase.Dispose(disposing)
    End Sub
    "Required by the Windows Form Designer
    Private components As System.ruponentModel.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()
        Me.SuspendLayout()
        "
        "Form1
        "
        Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
        Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
        Me.ClientSize = New System.Drawing.Size(800, 400)
        Me.Name = "Form1"
        Me.Text = "TransformArrow"
        Me.ResumeLayout(False)
    End Sub
End Class

Linear Gradient Brushes: Normal, Triangle, Bell and custom color

 
Imports System
Imports System.Collections
Imports System.ruponentModel
Imports System.Windows.Forms
Imports System.Data
Imports System.Configuration
Imports System.Resources
Imports System.Drawing
Imports System.Drawing.Drawing2D
Public Class MainClass
    Shared Sub Main()
        Dim myform As Form = New LinearGradientBrushesForm()
        Application.Run(myform)
    End Sub
End Class
Public Class LinearGradientBrushesForm
    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.ruponentModel.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.ruponentModel.Container()
        Me.Text = "LinearGradientBrushesForm"
    End Sub
#End Region

    Private Sub LinearGradientBrushesForm_Paint(ByVal sender As Object, ByVal e As PaintEventArgs) Handles MyBase.Paint
        Dim g As Graphics = e.Graphics
        Dim x As Integer = 0
        Dim y As Integer = 0
        Dim width As Integer = Me.ClientRectangle.Width
        Dim height As Integer = Me.ClientRectangle.Height / 4
        Dim blackBrush As Brush = Brushes.Black
        Dim b As LinearGradientBrush = New LinearGradientBrush(Me.ClientRectangle, Color.White, Color.Black, LinearGradientMode.Horizontal)
        g.FillRectangle(b, x, y, width, height)
        g.DrawString("Normal", Me.Font, blackBrush, x, y)
        y = y + height
        b.SetBlendTriangularShape(0.5)
        g.FillRectangle(b, x, y, width, height)
        g.DrawString("Triangle", Me.Font, blackBrush, x, y)
        y = y + height
        b.SetSigmaBellShape(0.5)
        g.FillRectangle(b, x, y, width, height)
        g.DrawString("Bell", Me.Font, blackBrush, x, y)
        y = y + height
        Dim blend As ColorBlend = New ColorBlend()
        blend.Colors = New Color() {Color.White, Color.Red, Color.Black}
        blend.Positions = New Single() {0.0, 0.5, 1.0}
        b.InterpolationColors = blend
        g.FillRectangle(b, x, y, width, height)
        g.DrawString("Custom Colors", Me.Font, blackBrush, x, y)
        y = y + height
    End Sub
End Class

Linear Gradient Brushes: Sigma bell shape

 
Imports System.Drawing.Drawing2D
Imports System
Imports System.Drawing.Text
Imports System.Drawing
Imports System.Windows.Forms
Imports System.Math
Public Class MainClass
   Shared Sub Main()
       Dim form1 As Form = New Form1()
       Application.Run(form1)
   End Sub 
End Class
 
 

Public Class Form1
    Private Sub Form1_Paint(ByVal sender As Object, _
     ByVal e As System.Windows.Forms.PaintEventArgs) Handles Me.Paint
        Dim y As Integer = 10
        Dim x As Integer = 10
        Dim wid As Integer = 200
        Dim hgt As Integer = 50
        Dim black_white_brush As New _
            LinearGradientBrush( _
                New Point(x, y), New Point(x + wid, y), _
                Color.Black, Color.White)
        " Sigma bell shape.
        e.Graphics.DrawString("SetSigmaBellShape", Me.Font, Brushes.Black, x, y)
        y += 15
        black_white_brush.SetSigmaBellShape(0.5, 1)
        e.Graphics.FillRectangle(black_white_brush, _
            x, y, wid, hgt)
    End Sub
End Class
 
 
<Global.Microsoft.VisualBasic.rupilerServices.DesignerGenerated()> _
Partial Public Class Form1
    Inherits System.Windows.Forms.Form
    "Form overrides dispose to clean up the component list.
    <System.Diagnostics.DebuggerNonUserCode()> _
    Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
        If disposing AndAlso components IsNot Nothing Then
            components.Dispose()
        End If
        MyBase.Dispose(disposing)
    End Sub
    "Required by the Windows Form Designer
    Private components As System.ruponentModel.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()
        Me.SuspendLayout()
        "
        "Form1
        "
        Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
        Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
        Me.ClientSize = New System.Drawing.Size(800, 400)
        Me.Name = "Form1"
        Me.Text = "TransformArrow"
        Me.ResumeLayout(False)
    End Sub
End Class

Linear Gradient Brushes: This brush"s line is too short to cross the whole rectangle

 
Imports System.Drawing.Drawing2D
Imports System
Imports System.Drawing.Text
Imports System.Drawing
Imports System.Windows.Forms
Imports System.Math
Public Class MainClass
   Shared Sub Main()
       Dim form1 As Form = New Form1()
       Application.Run(form1)
   End Sub 
End Class
 
 

Public Class Form1
    Private Sub Form1_Paint(ByVal sender As Object, _
     ByVal e As System.Windows.Forms.PaintEventArgs) Handles Me.Paint
        Dim y As Integer = 10
        Dim x As Integer = 10
        Dim wid As Integer = 200
        Dim hgt As Integer = 50
        Dim black_white_brush As New _
            LinearGradientBrush( _
                New Point(x, y), New Point(x + wid, y), _
                Color.Black, Color.White)
        " This brush"s line is too short to cross the whole rectangle.
        e.Graphics.DrawString("Short", Me.Font, Brushes.Black, x, y)
        y += 15
        Dim short_brush As New _
            LinearGradientBrush( _
                New Point(x, y), New Point(x + 50, y), _
                Color.Black, Color.White)
        e.Graphics.FillRectangle(short_brush, _
            x, y, wid, hgt)
    End Sub
End Class
 
 
<Global.Microsoft.VisualBasic.rupilerServices.DesignerGenerated()> _
Partial Public Class Form1
    Inherits System.Windows.Forms.Form
    "Form overrides dispose to clean up the component list.
    <System.Diagnostics.DebuggerNonUserCode()> _
    Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
        If disposing AndAlso components IsNot Nothing Then
            components.Dispose()
        End If
        MyBase.Dispose(disposing)
    End Sub
    "Required by the Windows Form Designer
    Private components As System.ruponentModel.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()
        Me.SuspendLayout()
        "
        "Form1
        "
        Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
        Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
        Me.ClientSize = New System.Drawing.Size(800, 400)
        Me.Name = "Form1"
        Me.Text = "TransformArrow"
        Me.ResumeLayout(False)
    End Sub
End Class

Linear Gradient Brushes: Trangular brush

 
Imports System.Drawing.Drawing2D
Imports System
Imports System.Drawing.Text
Imports System.Drawing
Imports System.Windows.Forms
Imports System.Math
Public Class MainClass
   Shared Sub Main()
       Dim form1 As Form = New Form1()
       Application.Run(form1)
   End Sub 
End Class
 
 

Public Class Form1
    Private Sub Form1_Paint(ByVal sender As Object, _
     ByVal e As System.Windows.Forms.PaintEventArgs) Handles Me.Paint
        Dim y As Integer = 10
        Dim x As Integer = 10
        Dim wid As Integer = 200
        Dim hgt As Integer = 50
        Dim black_white_brush As New _
            LinearGradientBrush( _
                New Point(x, y), New Point(x + wid, y), _
                Color.Black, Color.White)
        " Trangular brush.
        e.Graphics.DrawString("SetBlendTriangularShape", Me.Font, Brushes.Black, x, y)
        y += 15
        black_white_brush.SetBlendTriangularShape(0.5)
        e.Graphics.FillRectangle(black_white_brush, _
            x, y, wid, hgt)
    End Sub
End Class
 
 
<Global.Microsoft.VisualBasic.rupilerServices.DesignerGenerated()> _
Partial Public Class Form1
    Inherits System.Windows.Forms.Form
    "Form overrides dispose to clean up the component list.
    <System.Diagnostics.DebuggerNonUserCode()> _
    Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
        If disposing AndAlso components IsNot Nothing Then
            components.Dispose()
        End If
        MyBase.Dispose(disposing)
    End Sub
    "Required by the Windows Form Designer
    Private components As System.ruponentModel.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()
        Me.SuspendLayout()
        "
        "Form1
        "
        Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
        Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
        Me.ClientSize = New System.Drawing.Size(800, 400)
        Me.Name = "Form1"
        Me.Text = "TransformArrow"
        Me.ResumeLayout(False)
    End Sub
End Class

Make a rectangle that shades from black to white

 
Imports System.Drawing.Drawing2D
Imports System
Imports System.Drawing.Text
Imports System.Drawing
Imports System.Windows.Forms
Imports System.Math
Public Class MainClass
   Shared Sub Main()
       Dim form1 As Form = New Form1()
       Application.Run(form1)
   End Sub 
End Class
 
 

Public Class Form1
    Private Sub Form1_Paint(ByVal sender As Object, _
     ByVal e As System.Windows.Forms.PaintEventArgs) Handles Me.Paint
        Dim y As Integer = 10
        Dim x As Integer = 10
        Dim wid As Integer = 200
        Dim hgt As Integer = 50
        " Make a rectangle that shades from black to white.
        e.Graphics.DrawString("Simple", Me.Font, Brushes.Black, x, y)
        y += 15
        Dim black_white_brush As New _
            LinearGradientBrush( _
                New Point(x, y), New Point(x + wid, y), _
                Color.Black, Color.White)
        e.Graphics.FillRectangle(black_white_brush, _
            x, y, wid, hgt)
        y += hgt + 10
    End Sub
End Class
 
 
<Global.Microsoft.VisualBasic.rupilerServices.DesignerGenerated()> _
Partial Public Class Form1
    Inherits System.Windows.Forms.Form
    "Form overrides dispose to clean up the component list.
    <System.Diagnostics.DebuggerNonUserCode()> _
    Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
        If disposing AndAlso components IsNot Nothing Then
            components.Dispose()
        End If
        MyBase.Dispose(disposing)
    End Sub
    "Required by the Windows Form Designer
    Private components As System.ruponentModel.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()
        Me.SuspendLayout()
        "
        "Form1
        "
        Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
        Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
        Me.ClientSize = New System.Drawing.Size(800, 400)
        Me.Name = "Form1"
        Me.Text = "TransformArrow"
        Me.ResumeLayout(False)
    End Sub
End Class

Path Gradient Brushes: Diamond, Rectangle, Cirlce and quad

 
Imports System
Imports System.Collections
Imports System.ruponentModel
Imports System.Windows.Forms
Imports System.Data
Imports System.Configuration
Imports System.Resources
Imports System.Drawing
Imports System.Drawing.Drawing2D
Public Class MainClass
    Shared Sub Main()
        Dim myform As Form = New PathGradientBrushesForm()
        Application.Run(myform)
    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.ruponentModel.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.ruponentModel.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 triPoints As Point() = New Point() {New Point(width / 2, 0), New Point(0, height), New Point(width, height)}
        Dim b As PathGradientBrush = New PathGradientBrush(triPoints)
        b.SurroundColors = New Color() {Color.Red, Color.Blue}
        Dim x As Integer = 0
        Dim y As Integer = 0
        g.FillRectangle(b, x, y, width, height)
        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
        x = width
        y = 0
        g.FillRectangle(b, x, y, width, height)
        Dim diamondPoints As Point() = New Point() {New Point(width / 2, 0), New Point(width, height / 2), New Point(width / 2, height), New Point(0, height / 2)}
        b = New PathGradientBrush(diamondPoints)
        b.WrapMode = WrapMode.Tile
        b.CenterPoint = New PointF(0, height / 2)
        x = 0
        y = height
        g.FillRectangle(b, x, y, width, height)
        Dim circle As GraphicsPath = New GraphicsPath()
        circle.AddEllipse(0, 0, width, height)
        b = New PathGradientBrush(circle)
        b.WrapMode = WrapMode.Tile
        b.SurroundColors = New Color() {Color.White}
        b.CenterColor = Color.Black
        x = width
        y = height
        g.FillRectangle(b, x, y, width, height)
    End Sub
End Class

Path Gradient Brush: rectangle

 
Imports System.Drawing.Drawing2D
Imports System
Imports System.Drawing.Text
Imports System.Drawing
Imports System.Windows.Forms
Imports System.Math
Public Class MainClass
   Shared Sub Main()
       Dim form1 As Form = New Form1()
       Application.Run(form1)
   End Sub 
End Class
 
 

Public Class Form1
    Private Sub Form1_Paint(ByVal sender As Object, _
     ByVal e As System.Windows.Forms.PaintEventArgs) Handles Me.Paint
        Dim x As Integer = 10
        Dim y As Integer = 10
        Dim wid As Integer = 100
        Dim hgt As Integer = 50
        " Fill a rectangle.
        Dim rect_pts() As Point = { _
            New Point(x, y), _
            New Point(x + wid, y), _
            New Point(x + wid, y + hgt), _
            New Point(x, y + hgt) _
        }
        Dim path_brush As New PathGradientBrush(rect_pts)
        e.Graphics.FillPolygon(path_brush, rect_pts)
        y += hgt + 10
    End Sub
End Class
 
 
<Global.Microsoft.VisualBasic.rupilerServices.DesignerGenerated()> _
Partial Public Class Form1
    Inherits System.Windows.Forms.Form
    "Form overrides dispose to clean up the component list.
    <System.Diagnostics.DebuggerNonUserCode()> _
    Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
        If disposing AndAlso components IsNot Nothing Then
            components.Dispose()
        End If
        MyBase.Dispose(disposing)
    End Sub
    "Required by the Windows Form Designer
    Private components As System.ruponentModel.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()
        Me.SuspendLayout()
        "
        "Form1
        "
        Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
        Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
        Me.ClientSize = New System.Drawing.Size(200, 200)
        Me.Name = "Form1"
        Me.Text = ""
        Me.ResumeLayout(False)
    End Sub
End Class