Can't catch Access Violation!

[Norby mahoney]

Ok,

I've read through several threads on using SEH to catch exception that would normally not be caught by your standard try-catch blocks.

Using a basic setup, I cannot catch an Access Violation occuring in an ActiveX control that I am deleting.

static void my_translator(unsigned code, EXCEPTION_POINTERS *)
{
     throw code;
}


// called in dialog constructor:
_set_se_translator(my_translator);


CMydialog::OnCloseConnection()
{
     try
     {
           delete m_pWA;
    }
    catch(unsigned code)
    {
         AfxMessageBox("Testing:  caught access violation");
    }
}

Program crashes, my translator is never called. What am I missing?

[chi_luci]

that kind of catch is not working. See my post (or better the answers) here
mainly use SetUnhandledExceptionFilter good luck!

[Mick]

You can catch Structured Exceptions using catch(...).

Some conditions to be aware of...

1) The exception is occuring in another thread which is being started [your activeX call]. Exceptions are "thread-safe" but they are not propagated to other threads.

If you install a SE translator it must be done on a per thread bases. The SetUnhandledExceptionFilter(...) is a global handler.

2) Later versions of vc++ [8.0] the exception handling was changed such that you have to apply the /EHa switch to denote that you want to catch structured exceptions via a catch(...)

3) If you have faulty exception handling logic such as generating an exception out of a dtor of an local object being destructed while procesing a previous exception.

In the end you need to run your code under a debugger and find out why you are generating an exception in the ActiveX code.