Patrice,
I agree with Alexandre. Check out the BackgroundWorker. It is a new gizmo in .NET 2.0. It is very usefull and easy to use. Just drop it on your form and add code similar to this to the DoWork event:

    While (1)
         ExecuteQuery1()

         Thread.Sleep(1000)';

         ExecuteQuery2()

         Thread.Sleep(1000)';

         ExecuteQuery....
    End While

Notice that I have to qualify the semi-colon in VB :)

>Thanks for your answer.
>
>I'll try to explain more my problem.
>
>I a several database query to execute and I want to pause between each query. Like that, I give a pause to the processor.
>
>EX :
>
>

>Private Sub Main
>    While (1)
>         ExecuteQuery1()
>
>         Pause
>
>         ExecuteQuery2()
>
>         Pause
>
>         ExecuteQuery....
>    End While
>End Sub
>

>
>I hope that can help to understand the problem.
>thx