custom VCL exceptions, how?

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#6733

From: Francisco M. Marzoa
Date: Mon, 18 Apr 2005 15:42

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Hi,

I'm trying to create my own Exceptions to raise them when needed, but 
I've found some difficulties and I've not been able still :-(

On Delphi/Kylix the way seems to be easier than in builder: just create 
a class that's a descendant of Exception like:

EDeviceNoAnswer = class ( Exception );

And when you need to raise it, just do:

raise EDeviceNoAnswer.Create ( 'No answer sending Get Version command to 
Device' );

I've try to do the same with Builder C++, but it didn't work.

I've created my exception as:

class EDeviceNoAnswer : public Exception {};

And then I try to raise it in different manners, with different errors 
at compile time, i.e.:

throw EDeviceNoAnswer.Create ();

or just

throw EDeviceNoAnswer;

Says:

E2108 Improper use of typedef 'EDeviceNoAnswer'

throw new EDeviceNoAnswer();

Says:

E2125 Compiler could not generate default constructor for class 
'EDeviceNoAnswer'

And so on... Someone can help me? Thanks a lot in advance.

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