VB.Net by API/System.Windows.Forms/SystemColors

SystemColors.AppWorkspace

  
Imports System
Imports System.Drawing
Imports System.Windows.Forms
Imports System.Drawing.Text
Public Class MainClass
   Shared Sub Main()
        Dim myform As Form = New FrmDrawing()
        Application.Run(myform)
   End Sub " Main
End Class
Public Class FrmDrawing
   Inherits System.Windows.Forms.Form
   Public Sub New()
      MyBase.New()
      Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
      Me.BackColor = System.Drawing.SystemColors.AppWorkspace
      Me.ClientSize = New System.Drawing.Size(472, 157)
   End Sub
   Protected Overrides Sub OnPaint(ByVal paintEvent As PaintEventArgs)
      Dim graphicsObject As Graphics = paintEvent.Graphics
      Dim rectangle1 As Rectangle = New Rectangle(15, 35, 80, 80)
      Dim brush1 As SolidBrush = New SolidBrush(Color.Firebrick)
      Dim pen1 As Pen = New Pen(brush1, 1)
      Dim brush2 As SolidBrush = New SolidBrush(Color.DarkBlue)
      Dim pen2 As Pen = New Pen(brush2, 1)
      rectangle1.Location = New Point(100, 35)
      graphicsObject.DrawRectangle(pen1, rectangle1)
      graphicsObject.DrawArc(pen2, rectangle1, 0, 110)
   End Sub
End Class

SystemColors.Control

  
Imports System.Windows.Forms
Imports System.Drawing
Imports System.Drawing.Drawing2D
public class GetAllControlsOnForm
   public Shared Sub Main
        Application.Run(New Form1)
   End Sub
End class

Public Class Form1
    Private Sub ActRed_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ActRed.Click
        For Each scanControls As Control In Me.Controls
            If (TypeOf scanControls Is Label) Then
                scanControls.BackColor = Color.Red
            End If
        Next scanControls
    End Sub
    Private Sub ActNormal_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ActNormal.Click
        For Each scanControls As Control In Me.Controls
            If (TypeOf scanControls Is Label) Then
                scanControls.BackColor = SystemColors.Control
            End If
        Next scanControls
    End Sub
End Class

<Global.Microsoft.VisualBasic.rupilerServices.DesignerGenerated()> _
Partial Class Form1
    Inherits System.Windows.Forms.Form
    "Form overrides dispose to clean up the component list.
    <System.Diagnostics.DebuggerNonUserCode()> _
    Protected 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.Label1 = New System.Windows.Forms.Label
        Me.ActRed = New System.Windows.Forms.Button
        Me.Label2 = New System.Windows.Forms.Label
        Me.Label3 = New System.Windows.Forms.Label
        Me.ActNormal = New System.Windows.Forms.Button
        Me.SuspendLayout()
        "
        "Label1
        "
        Me.Label1.AutoSize = True
        Me.Label1.Location = New System.Drawing.Point(8, 8)
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(39, 13)
        Me.Label1.TabIndex = 0
        Me.Label1.Text = "Label1"
        "
        "ActRed
        "
        Me.ActRed.Location = New System.Drawing.Point(16, 88)
        Me.ActRed.Name = "ActRed"
        Me.ActRed.Size = New System.Drawing.Size(75, 23)
        Me.ActRed.TabIndex = 1
        Me.ActRed.Text = "Red"
        Me.ActRed.UseVisualStyleBackColor = True
        "
        "Label2
        "
        Me.Label2.AutoSize = True
        Me.Label2.Location = New System.Drawing.Point(8, 32)
        Me.Label2.Name = "Label2"
        Me.Label2.Size = New System.Drawing.Size(39, 13)
        Me.Label2.TabIndex = 2
        Me.Label2.Text = "Label2"
        "
        "Label3
        "
        Me.Label3.AutoSize = True
        Me.Label3.Location = New System.Drawing.Point(8, 56)
        Me.Label3.Name = "Label3"
        Me.Label3.Size = New System.Drawing.Size(39, 13)
        Me.Label3.TabIndex = 3
        Me.Label3.Text = "Label3"
        "
        "ActNormal
        "
        Me.ActNormal.Location = New System.Drawing.Point(104, 88)
        Me.ActNormal.Name = "ActNormal"
        Me.ActNormal.Size = New System.Drawing.Size(75, 23)
        Me.ActNormal.TabIndex = 4
        Me.ActNormal.Text = "Normal"
        Me.ActNormal.UseVisualStyleBackColor = True
        "
        "Form1
        "
        Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
        Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
        Me.ClientSize = New System.Drawing.Size(292, 127)
        Me.Controls.Add(Me.ActNormal)
        Me.Controls.Add(Me.Label3)
        Me.Controls.Add(Me.Label2)
        Me.Controls.Add(Me.ActRed)
        Me.Controls.Add(Me.Label1)
        Me.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle
        Me.MaximizeBox = False
        Me.Name = "Form1"
        Me.Text = "Iterating Controls"
        Me.ResumeLayout(False)
        Me.PerformLayout()
    End Sub
    Friend WithEvents Label1 As System.Windows.Forms.Label
    Friend WithEvents ActRed As System.Windows.Forms.Button
    Friend WithEvents Label2 As System.Windows.Forms.Label
    Friend WithEvents Label3 As System.Windows.Forms.Label
    Friend WithEvents ActNormal As System.Windows.Forms.Button
End Class

SystemColors.ControlDark

  

Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
public class GDIObjectsCreateGraphicColorSystemColors
   public Shared Sub Main
        Application.Run(New 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 canvas As Graphics = e.Graphics
        Dim colorBackground As Color =  SystemColors.ControlDark
        canvas.Clear(colorBackground)
        
        canvas = Nothing
    End Sub
End Class

<Global.Microsoft.VisualBasic.rupilerServices.DesignerGenerated()> _
Partial Class Form1
    Inherits System.Windows.Forms.Form
    "Form overrides dispose to clean up the component list.
    <System.Diagnostics.DebuggerNonUserCode()> _
    Protected 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(610, 328)
        Me.Name = "Form1"
        Me.Text = "Creating Graphics Objects (Color, Pen, Font, Brush)"
        Me.ResumeLayout(False)
    End Sub
End Class