Imports System
Imports System.Drawing
Imports System.Windows.Forms
Public Class MainClass
Shared Sub Main()
Dim myform As Form = New FrmComboBox()
Application.Run(myform)
End Sub ' Main
End Class
Public Class FrmComboBox
Inherits 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
Friend WithEvents cboImage As System.Windows.Forms.ComboBox
'Required by the Windows Form Designer
Private components As System.ComponentModel.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.cboImage = New System.Windows.Forms.ComboBox()
Me.SuspendLayout()
'
'cboImage
'
Me.cboImage.DropDownWidth = 121
Me.cboImage.Items.AddRange(New Object() {"Circle", "Square", "Ellipse", "Pie", "Filled Circle", "Filled Square", "Filled Ellipse", "Filled Pie"})
Me.cboImage.Location = New System.Drawing.Point(24, 16)
Me.cboImage.Name = "cboImage"
Me.cboImage.Size = New System.Drawing.Size(121, 21)
Me.cboImage.TabIndex = 0
'
'FrmComboBox
'
Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
Me.ClientSize = New System.Drawing.Size(292, 273)
Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.cboImage})
Me.Name = "FrmComboBox"
Me.Text = "ComboBoxTest"
Me.ResumeLayout(False)
End Sub
#End Region
Private Sub cboImage_SelectedIndexChanged _
(ByVal sender As System.Object, _
ByVal e As System.EventArgs) _
Handles cboImage.SelectedIndexChanged
Dim myGraphics As Graphics = MyBase.CreateGraphics()
Dim myPen As New Pen(Color.Red)
Dim mySolidBrush As New SolidBrush(Color.Red)
Dim x As Integer
Dim y As Integer
Dim width As Integer
Dim height As Integer
x = 50
y = 50
width = 150
height = 150
myGraphics.Clear(Color.Black)
Select Case cboImage.SelectedIndex
Case 0
myGraphics.DrawEllipse(myPen, x, y, width, height)
Case 1
myGraphics.DrawRectangle(myPen, x, y, width, height)
Case 2
myGraphics.DrawEllipse(myPen, x, y, width, 75)
Case 3
myGraphics.DrawPie(myPen, x, y, width, height, 0, 45)
Case 4
myGraphics.FillEllipse(mySolidBrush, x, y, width, height)
Case 5
myGraphics.FillRectangle(mySolidBrush, x, y, width, height)
Case 6
myGraphics.FillEllipse(mySolidBrush, 50, 85, 150, 115)
Case 7
myGraphics.FillPie(mySolidBrush, 50, 50, 150, 150, 0, 45)
End Select
End Sub
End Class
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