窗体事件：

1.装载窗体

2.单击窗体

3.双击窗体

4.改变了窗体大小

Public Class Form1

    Private Sub Form1_Click(ByVal sender As Object,ByVal e As System.EventArgs) Handles Me.Click
        Me.BackgroundImageLayout = ImageLayout.Tile '以平铺方式显示窗体背景
        Me.BackgroundImage = Image.FromFile("background.bmp") '装入相应图片
        Me.Text = "单击窗体"
        Me.Icon = New Icon("MONITR01.ico")    ' 改变窗体左上方的小图标
        Me.Cursor = New Cursor("KEY04.ICO")   ' 鼠标指针改为指定的文件名图标
        Me.MaximizeBox = True
        Me.MinimizeBox = True
    End Sub

    Private Sub Form1_DoubleClick(ByVal sender As Object,ByVal e As System.EventArgs) Handles Me.DoubleClick
        Me.BackgroundImageLayout = ImageLayout.Stretch  '以拉伸方式显示窗体背景
        Me.Text = "双击窗体"
    End Sub

    Private Sub Form1_Load(ByVal sender As System.Object,ByVal e As System.EventArgs) Handles MyBase.Load
        Me.BackgroundImage = Image.FromFile("PC01.ICO")
        Me.Text = "装载窗体"
    End Sub

    Private Sub Form1_Resize(ByVal sender As Object,ByVal e As System.EventArgs) Handles Me.Resize
        Me.BackgroundImage = Nothing  ' 卸掉图片，窗体无背景图片
        Me.MaximizeBox = False
        Me.MinimizeBox = False
        Me.Cursor = Cursors.Default  ' 鼠标指针恢复为默认值
        Me.Icon = Nothing
        Me.Text = "改变了窗体大小"
    End Sub
End Class