Are you referencing PowerPoint objects? If so we have a community post that has details about interaction with PowerPoint objects.
I hope this helps!
Solutions Engineer @ SmartBear
I've never worked with PowerPoint and TestComplete before and an initial test shows that I can only see the slide via the Object Spy and not any of its components. Is it an option for you to obtain a region checkpoint of how the slide should look after the alterations? If so, you could then do region comparison, which will show in the log file either as having passed or failed. my EH trip