vb.net三层设计 vb界面设计时会用到哪些类

用vb.net编写项目移动。。。求高人指点。。。。

窗体是指由两个列表框（ListBox1、ListBox2）和4个命令按钮（Button1“”按钮，Button2“”按钮，Button3“”按钮，Button4“”按钮）所构成的界面，代码：

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Public Class Form1

Private Sub Form1_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load

Me.Text = "选项移动"

ListBox1.SelectionMode = SelectionMode.MultiSimple

ListBox2.SelectionMode = SelectionMode.One

For i = 1 To 10

ListBox1.Items.Add(Chr(Asc("a") + i - 1))

Next

For i = 1 To 10

ListBox2.Items.Add(i.ToString)

Next

End Sub

Private Sub Button1_Click(sender As System.Object, e As System.EventArgs) Handles Button1.Click

If ListBox1.SelectedItems Is Nothing Then Exit Sub

Dim b As ListBox.ObjectCollection

For i = 0 To Me.ListBox1.SelectedItems.Count - 1

Me.ListBox2.Items.Add(Me.ListBox1.SelectedItems(0))

Me.ListBox1.Items.RemoveAt(Me.ListBox1.SelectedIndices(0))

Next

End Sub

Private Sub Button3_Click(sender As System.Object, e As System.EventArgs) Handles Button3.Click

If ListBox2.SelectedItems IsNot Nothing Then

ListBox1.Items.Add(ListBox2.SelectedItem)

ListBox2.Items.Remove(ListBox2.SelectedItem)

End If

End Sub

Private Sub Button2_Click(sender As System.Object, e As System.EventArgs) Handles Button2.Click

For Each itm As Object In ListBox1.Items

ListBox2.Items.Add(itm)

Next

ListBox1.Items.Clear()

End Sub

Private Sub Button4_Click(sender As System.Object, e As System.EventArgs) Handles Button4.Click

For Each itm As Object In ListBox2.Items

ListBox1.Items.Add(itm)

Next

ListBox2.Items.Clear()

End Sub

End Class

VB.net 如何设计多线程运行

Sub Main()

Dim thr As Thread

For Pi As Integer=0 To 4 //启用5线程

MulParams =Pi vbTab sFile vbTab dFile vbTab 1 vbTab DelN vbTab cr vbTab cg vbTab cb vbTab IndexI

GlobalParamas(pi)=MulParams .Split(vbTab)

thr=New Thread(AddressOf MyMulThreadCaller)

thr.Start() //启动多线程进程

Application.DoEvents

Next

End Sub

vb.net 集成开发的三种模式

设计模式：界面设计和代码编辑

运行模式：运行应用程序

中断模式：暂时中断运行，调试程序

怎么利用VB.NET实现三维绘图

数学上不是有斜二测画法，算好坐标即可画出

或者用AnyCAD的.Net图形控件

也可以调用matlab 实现