vb.net2012操作跨窗体控件（单线程和多线程两种方法）实例
在码农的生活中，很多级码农都有这样的经历，会被一个小小的技术问题拦住，然后进度跟不上了，被老板XXXX一大通了。心情不爽了。
好吧，这个曾经是我遇到拦路虎之一。但事实上不是什么大技术。技术就是一层纸，破了就破了。
这是一个关于如何跨窗体操作控件或过程的一个例子。比如，你想用窗体A的按键来执行窗体B的文本框变色。
Imports System
Imports System.Threading
Imports System.Text
Public Class Form1
Private Sub Form1_Load(sender As Object, e As EventArgs) Handles Me.Load
CheckForIllegalCrossThreadCalls = False '不写这行，会出错，不允许线程的数据写到TextBox1.Text 中去。
Form2.Show()
End Sub
Private Sub form1_FormClosing(sender As Object, e As EventArgs) Handles Me.FormClosing
' If runThread.IsAlive = True Then runThread.Abort()
End Sub
Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click
'用的是委托方式
Me.Invoke(New MethodInvoker(AddressOf THREAD2))
End Sub
Private Sub THREAD2()
Static j As Integer
j = j + 1
TextBox1.Text = " 这是 [线程] 操作" & vbCrLf & _
" Button2被点了: " & j & " 次" & vbCrLf & "要求是from2.textbox.text= textbox1.text 。[问题]但为什么不能成功显示呢？"
End Sub
Private Sub TextBox1_TextChanged(sender As Object, e As EventArgs) Handles TextBox1.TextChanged
Form2.TextBox1.Text = TextBox1.Text
End Sub
Private Sub Button3_Click(sender As Object, e As EventArgs) Handles Button3.Click
Static j As Integer
j = j + 1
TextBox1.Text = " 这是 [非线程] 操作" & vbCrLf & _
"Button3 点击了: " & j & " 次" & vbCrLf & _
"要求是from2.textbox.text= textbox1.text， 可以成功显示，这个是对的。"
End Sub
End Class
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