Repaint causes CPU loading and failed test

[VFaul]

I have a form with a tab control with several tabs. The main tab has many controls on it. The app is performing various "tests" and displaying pass/fail in the main tab. One of the tests is a communication test. It sends out a message and expects an asynchronous reply within a certain timeout. When I click on a tab and then go back to the main tab, it takes almost a second for all the controls to be repainted. This causes the CPU to peg at 100% usage and will occasionally cause my communication test to timeout (the timer expires before the reply is received). Does anyone have any ideas to get around this problem? I have already increased the timeout period as much as I want to. I also do not want to disable the test when I switch tabs. Thanks VF

[KevinMac]

Just brainstorming but I would think about threading the UI and try to get a lazier load if possible. Here are the articles I have used

[KevinMac]

Messed up the links ^ ^

[VFaul]

You were correct! I was doing everything inside the UI thread. I redesigned the app to use threads for each of my tests. Now the test never fails, even when the CPU is maxed at 100%!!!

[KevinMac]

Great to hear did you get a chance to work with the background worker object or did you write your own threading class?