主题：多线程代码

 很早之前编写过下面这样的多线程代码，现在忘记怎么用了，解释下？

Dim th1 As Threading.Thread

    Dim th2 As Thread1ng.Thread

    th1 = New Thread1ng.Thread(AddressOf setA)

    th2 = New Thread1ng.Thread(AddressOf setB)

   xxxxx

        th1.Start()

xxxxx

th2.start（）