I've kind of introduced the series by a poll question Reraising Exceptions in Delphi - How to Properly. Some 10% of those who voted said they do not know about reraising exceptions (or never use), some 15% answered wrongly (maybe the question was confusing) and others (75%) knew the answer.
For the starters: what's an error in an application? What's an exception? How to trap exceptions? Why your Delphi application does not crash like some .Net apps do, etc...
Read the full article to learn On Handling Exceptions in Delphi Exception Handling