Namespace
In .NET,
threading functionality is defined in System.Threading namespace. So you have to
define System.Threading namespace before using any thread classes.
Imports
System.Threading
Starting a
Thread
A Visual Basic
client program starts in a single thread created automatically by the CLR and
operating system that is called main thread, and is made multithreaded by
creating additional threads. Here's a simple example and its output.
Imports
System.Threading
Module Module1
Sub Main()
Dim th As New Thread(AddressOf
WriteY)
th.Start()
For i As Integer = 0 To
10
Console.WriteLine("Hello")
Next
End Sub
Private Sub
WriteY()
For i As Integer = 0 To
9
Console.Write("world")
Next
End Sub
End Module
In the above
example, The main thread creates a new thread th on which it runs a method that
repeatedly prints the string “world”. Simultaneously, the main thread repeatedly
prints the string“Hello”.
Pausing a Thread
Thread.Sleep method can be
used to pause a thread for a fixed period of time.
thread.Sleep()
Here's a simple
example and its output.
Imports
System.Threading
Module Module1
Sub Main()
Dim th As New Thread(AddressOf
WriteY)
th.Start()
For i As Integer = 0 To
10
Console.WriteLine("Hello")
Thread.Sleep(1000)
Next
End Sub
Private Sub
WriteY()
For i As Integer = 0 To
9
Console.WriteLine("world")
Thread.Sleep(500)
Next
End Sub
End Module
In the above
example, The main thread creates a new thread th which is pause by sleep method for
500 milliseconds. The main thread is also pause by sleep method for
1000 milliseconds.