I think we may achieve this by using WaitForEvent (Destroyed) methods for each of the controls and using a parallel process. We can then check for the Fired event from each of these methods and once all is fired (threads are completed), then use the completed event to proceed to the next process.

You can create ForLoop and check IsCreated properties for each control on each iteration, then call Break when all IsCreated are false.

Use waitall for destroyed as well.