P.S. I implemented Structured Exception Handling for Win32, with help from a couple very smart people. Microsoft completely changed it for Win64, and the documentation on it is completely unhelpful to nonexistent.[1] I simply gave up on it. D on Win64 uses the exception handling mechanism I invented for the 32 bit DOS extender from the old Zortech days. It works fine, except that it cannot interact with C++ exceptions thrown by VC++ code.

[1] I attended a presentation on it by MS soon after Win64 came out. All I could think of at the end was "what's a cubit". I understood exactly nothing about it.