console app timer events - do loops need App.DoEvents?

General
1

Hello all.

I am working on a console app that polls devices on a serial port. In addition to the DoEvents in the Run Event

While StayAlive = True
  Doevents
wend

I am wondering if I need to add App.DoEvents when in a loose loop? I am pretty sure the answer is no, especially when I am using Timers as part of the app. Basically during the execution of a do loop within the app, I start certain timers. I want to be sure they will go off at roughly the time they should (usually 500mS intervals).

What say you?
Thanks,
Tim

2

in theory it shouldnt hurt to put that in loops esp if they are really busy tight and long running ones

3

Thanks Norman.
To ask another related question, the Timer events will fire even if inside this loop and without any execess DoEvents. Is that correct?

Tim

4

I believe thats true

5

Thank you again Norman.
That is my expectation as well, and it does appear to work that way too

Tim

6

We usually use DoEvents to have a main loop in console apps where we need a main loop.
e.g. for sockets and timers.

7

Another way to handle this is to put only the loop in the Run event and put your main code in a Thread. Timers can be set up in either.

8

Tim - keep in mind that there’s what “Should” work and then there’s Linux and what DOES work.

Linux loops can be so tight that a console app will not update the stdout stream until the end of the loop or app exit without calling App.DoEvents(5). If you are expecting ANY I/O in that while loop on Linux, you really do want to add the App.DoEvents().