Visual Basic - Start process or tasks after a specific delay - vb.net

Question

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Process.Start("https://google.com/")
'I want to wait here for 20 seconds. Then I want him to open the yandex.
Process.Start("https://yandex.com/")
End Sub
Can you help me how can I do. Thanks for all.

Answer 1

In this example you can see how start a process after a specific delay.
In your case is launch a browser but you can use in other scenarios as a technique delay related.
Take a look on code and improve it based in your necessities.
Event TimerDone()
Private Sub ProcessStartAfterDelay(Optional ByVal url As String = "", Optional interval As Integer = 2000)
Dim tmr As System.Windows.Forms.Timer = New System.Windows.Forms.Timer
AddHandler tmr.Tick, Sub()
tmr.Stop()
tmr.Dispose()
If url.Length > 0 Then
Try
Process.Start(url)
RaiseEvent TimerDone()
Catch ex As Exception
Console.WriteLine(ex.ToString)
End Try
End If
End Sub
tmr.Interval = interval
tmr.Start()
End Sub
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim index As Integer = 0
Dim delay As Integer = 3000
Dim listOfUrls As List(Of String) = New List(Of String)({"https://google.com/",
"https://yandex.com/",
"https://it.yahoo.com/",
"https://www.wikipedia.org/"})
' First launch need to be here with delay > 0 important!
ProcessStartAfterDelay(listOfUrls(index), 1)
AddHandler Me.TimerDone, Sub()
index += 1
If index < listOfUrls.Count Then
ProcessStartAfterDelay(listOfUrls(index), delay)
Else
RemoveHandler Me.TimerDone, Nothing
End If
End Sub
End Sub