Exceptions and Runtime Errors in Libraries

When an exception is raised but not handled in a dynamically loadable library, it propagates out of the library to the caller. If the calling application or library is itself written in Delphi, the exception can be handled through a normal try...except statement.

On Win32, if the calling application or library is written in another language, the exception can be handled as an operating-system exception with the exception code $0eedfade. The first entry in the ExceptionInformation array of the operating-system exception record contains the exception address, and the second entry contains a reference to the Delphi exception object.

Generally, you should not let exceptions escape from your library. Delphi exceptions map to the OS exception model (including the .NET exception model)..

If a library does not use the SysUtils unit, exception support is disabled. In this case, when a runtime error occurs in the library, the calling application terminates. Because the library has no way of knowing whether it was called from a Delphi program, it cannot invoke the application's exit procedures; the application is simply aborted and removed from memory.

Project Management Made Easy

Project Management Made Easy

What you need to know about… Project Management Made Easy! Project management consists of more than just a large building project and can encompass small projects as well. No matter what the size of your project, you need to have some sort of project management. How you manage your project has everything to do with its outcome.

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