How does SetUnhandledExceptionFilter work in .NET WinForms applications?

Question

I am working on a project to enhance our production debugging capabilities. Our goal is to reliably produce a minidump on any unhandled exception, whether the exception is

Answer 1

SetUnhandledExceptionFilter installs a handler that is invoked when a Win32-excpetion reaches the top of a threads callstack without being handled.

In many language runtimes including managed, language exceptions are implemented using Win32 exceptions. But, the managed runtime will have a top level __try __catch(...) block at the top of each thread that will catch any win32 to runtime exceptions and process them without letting them escape to Win32's top level handler.

Knowledge of the specific runtime would be necessary to inject a handler at this level because the exceptions will never be allowed to escape to Win32's TheadProc handler.