变量值的改变本身就是你程序控制的，也就是说它的变化完全是在你掌控中的，做变量值改变的触发事件实在没有价值。
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通常编程者关心的应该是用户操作的控件值发生变化，但这些控件的事件通常都是定义好的，且已经定义的非常全了。
猜测搂主其实是想学习自己制作控件，那就高深了，很多底层的事件通常都是从基本控件中获得的！
Imports System.Text
Imports System.Windows
Imports System.Windows.Forms
Public Class Netin '类 名
'Inherits Forms.Form
Public Shared Netin As New Form
Public components As ComponentModel.IContainer
Protected Overrides Sub Finalize()
MyBase.Finalize()
End Sub
DebuggerStepThrough()
Public Sub InitializeComponent()
Me.components = New ComponentModel.Container()
Dim resources As ComponentModel.ComponentResourceManager = New System.ComponentModel.ComponentResourceManager(GetType(bjt))
Me.TextBox1 = New TextBox(Me.components)
Me.Button1 = New Button(Me.components)
'For … Next
Me.Controls.Add(Me.TextBox1)
Me.Controls.Add(Me.Button1)
Me.m = New ContextMenuStrip(Me.components)
Me.m1.Text = "菜单项1"
'设置并添加相关控件，(窗体)Netin 初始化。
End Sub
Private Sub Form_Load(sender As Object, e As EventArgs) Handles Me.Load
'加载后显示窗体Netin。
End Sub
Public Sub ObjClick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click,Button2.Click,Button3.Click,TextBox1.Click
MessageBox.Show("你按了鼠标")
End Sub
Public WithEvents TextBox1 As TextBox
Public WithEvents Button1 As Button
Public WithEvents Button2 As Button
Public WithEvents Button3 As Button
Friend WithEvents m As ContextMenuStrip
Friend WithEvents m1 As ToolStripMenuItem
End Class
Class MainWindow
Netin.Show()
Netin.Button2.Text = "Main"
……
大体看一下这个类里的事件都是私有的（Private） 如果想在窗体中使用这个事件就把类中事件前的Private关键字改成Public如：
Public Sub PicCurve_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles PicCurve.Paint
在窗体中调用的方法就是实例化类就行了。因为这个类有NEW所以在实例化的时候要赋参数
代码如下数值是我临时写的。调用的时候你根据实际情况改一下就行。参数PictureBox1是在窗体上添加的PictureBox控件。
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim AA() As Single = {0.1, 1.2, 1.5, 1.6, 1.8}
Dim clsPaint As New bbbb(PictureBox1, AA, "PictureBox_1")
clsPaint.PicCurve_Paint(Me, Nothing)
End Sub
