Exception Handling for Embedded Visual C++ (Windows CE 5.0)
Win32 structured exception handling (SEH) differs from C++ exception handling. C++ exception handling model deals in types, but Win32 SEH deals with exceptions of one type: unsigned int. That is, Win32 exceptions are identified by an unsigned integer value, but C++ exceptions are identified by data type.
When an exception is raised in the SEH model, each possible handler executes a filter that examines the exception context and determines whether to accept the exception, pass it to another handler, or ignore it.
When an exception is thrown in C++, it can be of any type.
A second difference is that the Win32 SEH model is asynchronous, because exceptions occur secondary to the normal flow of control. The C++ exception handling mechanism is synchronous, which means that exceptions occur only when they are thrown with the throw keyword.
See Also
Exception Handling for Windows CE | Exception Handling Overhead
Send Feedback on this topic to the authors