Imports System
Imports System.Collections
Imports System.ComponentModel
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 DrawingForm()
Application.Run(myform)
End Sub
End Class
Public Class DrawingForm
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.
Friend WithEvents drawEllipseButton As System.Windows.Forms.Button
<System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
Me.drawEllipseButton = New System.Windows.Forms.Button()
Me.SuspendLayout()
'
'drawEllipseButton
'
Me.drawEllipseButton.Location = New System.Drawing.Point(43, 32)
Me.drawEllipseButton.Name = "drawEllipseButton"
Me.drawEllipseButton.TabIndex = 1
Me.drawEllipseButton.Text = "Draw Ellipse"
'
'Form1
'
Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
Me.ClientSize = New System.Drawing.Size(160, 86)
Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.drawEllipseButton})
Me.Name = "Form1"
Me.Text = "Form1"
Me.ResumeLayout(False)
End Sub
#End Region
Dim drawEllipse As Boolean = False
Private Sub drawEllipseButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles drawEllipseButton.Click
drawEllipse = Not drawEllipse
Me.Refresh()
End Sub
Private Sub DrawingForm_Paint(ByVal sender As Object, ByVal e As PaintEventArgs) Handles MyBase.Paint
Dim blue25PercentOpaque As Color = Color.FromArgb(255 * 1 / 4, 0, 0, 255)
Dim blue75PercentOpaque As Color = Color.FromArgb(-1090518785)
Dim white As Color = Color.FromArgb(255, 255, 255)
Dim black As Color = Color.FromArgb(0, 0, 0)
Dim blue1 As Color = Color.BlueViolet
Dim blue2 As Color = Color.FromKnownColor(KnownColor.ActiveBorder)
Dim blue3 As Color = Color.FromName("ActiveBorder")
Dim htmlBlue As Color = ColorTranslator.FromHtml("#0000ff")
If Not drawEllipse Then Return
Dim g As Graphics = e.Graphics
Dim b As Brush = New SolidBrush(blue25PercentOpaque)
g.FillEllipse(b, Me.ClientRectangle)
End Sub
End Class
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