Quote Originally Posted by Eduardo- View Post
In these cases it is better to add a Timer control, Interval 15 ms, Enabled = False at design time.
Then in the tab change event, if it is the tab where the long process must take place, set the timer Enabled = True.
Then move the long process to the timer. And of course set the timer to Enabled = False from its timer procedure too.

It is not a problem of the tab Control. The other controls paintings are not updated (what is normal anyway in such cases).
Hi Eduardo,

This did the trick! 15ms seemed a bit too tight, so I settled for 100ms, and all seems to work great. Will do more testing in the upcoming days, but the results so far look very good.

Once again many thanks!!! Not only for a great tab-control, but also for your support in finding solutions to challenges that may only be sideways related to your control, if at all. It is greatly appreciated.

Thanks,
Erwin