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Hello, How can I repeat again and again code if process still running?

I want to check if program still running, if yes, check again and again, if no continue in execute next part of code.

Function CheckIfRunning() As Boolean
        p = Process.GetProcessesByName("Ls32") 
        
        If p.Count > 0 Then
            ' Process is running
            CheckIfRunning = True

        Else
            ' Process is not running
            CheckIfRunning = False
        End If
    End Function


'calling function
CheckIfRunning()
                               If CheckIfRunning() = True Then
                                   CheckIfRunning()
                                   Threading.Thread.Sleep(800)
                               Else
                                   ButtonIncrement_Click(Nothing, Nothing)
                               End If


What I have tried:

while CheckIfRunning()=true
Loop
Posted
Updated 4-Dec-19 7:20am

The problem is that if you loop on your function, your UI thread is blocked until the process is completed - and if it's blocked, it can;t respond to user input and will "lock up" as far as the user is concerned.

I'd suggest that you look at a BackgroundWorker thread to process your loop, and to report "Process complete" back to your UI thread.
BackgroundWorker Class (System.ComponentModel) | Microsoft Docs[^] - it includes an example.
   
Comments
Member 13711215 5-Dec-19 2:59am
   
Thank you
OriginalGriff 5-Dec-19 3:13am
   
You're welcome!
Aside from solution 1 which is quite relevant, I would advise you not to compare a boolean to a boolean.
Instead of
If CheckIfRunning() = True Then
write
If CheckIfRunning() Then
And for the contrary, instead of
If CheckIfRunning() = False Then
write
If Not CheckIfRunning() Then
The reason for that is that comparing a boolean to a boolean is redundant and thus unnecessary.
   

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