The GetExceptionInformation function retrieves a machine-independent description of an exception, and information about the machine state that existed for the thread when the exception occurred. This function can be called only from within the filter expression of a try-except exception handler.
Note The Microsoft C/C++ Optimizing Compiler interprets this function as a keyword, and its use outside the appropriate exception-handling syntax generates a compiler error.
LPEXCEPTION_POINTERS GetExceptionInformation(VOID)
This function has no parameters.
The return value is a pointer to an EXCEPTION_POINTERS structure that contains pointers to two other structures: an EXCEPTION_RECORD structure containing a description of the exception, and a CONTEXT structure containing the machine-state information.
The filter expression (from which the function is called) is evaluated if an exception occurs during execution of the try block, and it determines whether the except block is executed.
The following example shows the structure of a try-except statement.
try
{
// try block
}
except ( FilterFunction(GetExceptionInformation() )
{
// exception handler block
}
The filter expression can invoke a filter function. The filter function cannot call GetExceptionInformation. However, the return value of GetExceptionInformation can be passed as a parameter to a filter function.
To pass the EXCEPTION_POINTERS information to the exception-handler block, the filter expression or filter function must copy the pointer or the data to safe storage that the handler can later access.
In the case of nested try-except statements, each statement's filter expression is evaluated until one is evaluated as EXCEPTION_EXECUTE_HANDLER or EXCEPTION_CONTINUE_EXECUTION. Each filter expression can invoke GetExceptionInformation to get exception information.
Windows CE: The Excpt.h file must be explicitly included in order to use GetExceptionInformation.
Windows NT: Requires version 3.1 or later.
Windows: Requires Windows 95 or later.
Windows CE: Requires version 1.0 or later.
Structured Exception Handling Overview, Structured Exception Handling Functions, CONTEXT, EXCEPTION_POINTERS, EXCEPTION_RECORD, GetExceptionCode