VB.Net Tutorial/GUI/Control Properties

Change Control"s background color

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

Set Control"s foreground color

Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
public class ColorDialogSetForgroundBackgroundColor
   public Shared Sub Main
        Application.Run(New FrmColorDialogTest)
   End Sub
End class
Public Class FrmColorDialogTest
   Inherits System.Windows.Forms.Form
   Friend WithEvents cmdBackgroundButton As Button
   Friend WithEvents cmdTextButton As Button
#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()
      Me.cmdBackgroundButton = New System.Windows.Forms.Button()
      Me.cmdTextButton = New System.Windows.Forms.Button()
      Me.SuspendLayout()
      "
      "cmdBackgroundButton
      "
      Me.cmdBackgroundButton.Location = New System.Drawing.Point(16, 16)
      Me.cmdBackgroundButton.Name = "cmdBackgroundButton"
      Me.cmdBackgroundButton.Size = New System.Drawing.Size(160, 24)
      Me.cmdBackgroundButton.TabIndex = 0
      Me.cmdBackgroundButton.Text = "Change Background Color"
      "
      "cmdTextButton
      "
      Me.cmdTextButton.Location = New System.Drawing.Point(16, 56)
      Me.cmdTextButton.Name = "cmdTextButton"
      Me.cmdTextButton.Size = New System.Drawing.Size(160, 24)
      Me.cmdTextButton.TabIndex = 1
      Me.cmdTextButton.Text = "Change Text Color"
      "
      "FrmColorDialogTest
      "
      Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
      Me.ClientSize = New System.Drawing.Size(192, 93)
      Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.cmdTextButton, Me.cmdBackgroundButton})
      Me.Name = "FrmColorDialogTest"
      Me.Text = "Using Color Dialogs"
      Me.ResumeLayout(False)
   End Sub
#End Region
   Dim colorBox As ColorDialog = New ColorDialog()
   Private Sub cmdTextButton_Click(ByVal sender As System.Object, _
      ByVal e As System.EventArgs) Handles cmdTextButton.Click
      Dim result As DialogResult
      result = colorBox.ShowDialog()
      If result = DialogResult.Cancel Then
         Return
      End If
      cmdBackgroundButton.ForeColor = colorBox.Color
      cmdTextButton.ForeColor = colorBox.Color
   End Sub 
   Private Sub cmdBackgroundButton_Click( _
      ByVal sender As System.Object, _
      ByVal e As System.EventArgs) _
      Handles cmdBackgroundButton.Click
      Dim result As DialogResult
      colorBox.FullOpen = True
      result = colorBox.ShowDialog()
      If result = DialogResult.Cancel Then
         Return
      End If
      Me.BackColor = colorBox.Color
   End Sub
End Class