Private Sub ComboBox1_SelectedIndexChanged(ByVal sender As System.Object, _
    ByVal e As System.EventArgs) Handles ComboBox1.SelectedIndexChanged

    ' Cast the sender object back to a ComboBox.
    Dim ComboBox1 As ComboBox = CType(sender, ComboBox)

    ' Retrieve the selected item.
    Dim selectedString As String = CType(ComboBox1.SelectedItem, String)

    ' Convert it to lowercase.
    selectedString = selectedString.ToLower()

    ' Declare the current size.
    Dim currentSize As Single

    ' Switch on the selected item. 
    Select Case selectedString

        ' If Bigger is selected, get the current size from the 
        ' Size property and increase it. Reset the font to the
        '  new size, using the current unit.
    Case "bigger"
            currentSize = Label1.Font.Size
            currentSize += 2.0F
            Label1.Font = New Font(Label1.Font.Name, currentSize, _
                Label1.Font.Style, Label1.Font.Unit)

            ' If Smaller is selected, get the current size, in points,
            ' and decrease it by 1.  Reset the font with the new size
            ' in points.
        Case "smaller"
            currentSize = Label1.Font.SizeInPoints
            currentSize -= 1
            Label1.Font = New Font(Label1.Font.Name, currentSize, _
                Label1.Font.Style)
    End Select
End Sub

' 导入命名空间
Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms

public class FontStyleCreate
   public Shared Sub Main
        Application.Run(New Form1)
   End Sub
End class

Public Class Form1
    Inherits System.Windows.Forms.Form

    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 mainFont As Font
        Dim textStyle As New FontStyle
        textStyle = FontStyle.Regular
        mainFont = New Font("Arial", 40, textStyle)
        
        Dim brush1 As New SolidBrush(Color.DarkBlue)
        canvas.DrawString("www.java2s.com",mainFont, brush1, 120, 70)        
        
        canvas = Nothing
    End Sub
End Class