c++-Exception-Handling when using the jpeglib

Hi!

Could anyone provide a solution for my problem:

I use the (C-written) jpeglib and I want to provide my own error
handler, implemented with try/catch. I don't have any idea why it
doesn't work. After I read the documentation of the library, lngjmp
and setjmp are proposed to handle errors properly. MSDN says: "DO not
use setjmp/lngjmp" within c++-applications. So I tried the following:

- Wrote a class with a static function "static void ErrorHandler"
which throws an Error-code whenever something goes wrong within the
jpeglib.

- the jpeg-struct has a function-pointer to the error handler (called
"jerr"). So, when writing my c++-app. I mapped the functionpointer to
my own static function:

suJpegStruct->jerr = MyClass::ErrorHandler;

The class looks like this:

const int ERR_JPEG = -123456;

class CTest
{
public:
       static void ErrorHandler()
        {
               throw ERR_JPEG;
        }

        void Proceed()
        {
      [...]
                    suJpegStruct->ErrorHandler;

              try
              {
                      // Jpeg-Stuff
              }
              catch(int lError_e)
              {
                       // Error-handler
              }
};

The Problem is: when an error comes up, my code walks straight into
the ErrorHandler (checked with a printout "In Errorhandler") but then,
after the exception has been thrown, never goes back to the catch-
branch.

Does anyone have a better idea or even a solution, what I did wrong?

Thanks in advance for your help,

Frank

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