How to loop smooth and correctly in VB.NET?

Question

What I have:

Process.Start("powershell.exe", "-executionpolicy remotesigned -file C:\temp\test.ps1")


        Do Until (ready = True)

            If Process.GetProcessesByName("powershell").Length <> 0 Then
                ready = False
            Else
                ready = True
            End If
        Loop

... more code ...

Currently my program freezes while powershell is active. If the powershell script takes too long time, more then 60 seconds, my program also crashes. How finally make it smooth, like using a timer so that it does not freeze anymore.

EDIT:

Finally I'd like to check every 5 seconds if powershell is active.

EDIT 2:

I can just do

Dim test As Process = Process.Start("powershell.exe", "-executionpolicy
remotesigned -file C:\temp\test.ps1")

    test.WaitForExit()

And it does not crashes anymore, but it still freezes :/

Answer 1

Try using another thread, it will prevent your main thread from freezing. To understand how the threads work check some tutorials about threading like this one.

Dim Thread1 As Threading.Thread

Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
    'Creates a new thread
    Thread1 = New Threading.Thread(Sub() MyProcess())
    'Starts the thread
    Thread1.Start()
End Sub

Private Sub MyProcess()
    Process.Start("powershell.exe", "-executionpolicy remotesigned -file C:\temp\test.ps1")

    Do Until (ready = True)

        If Process.GetProcessesByName("powershell").Length <> 0 Then
            ready = False
        Else
            ready = True
        End If
    Loop
End Sub