http://bugs.winehq.org/show_bug.cgi?id=15421
--- Comment #2 from Detlef Riekenberg wine.dev@web.de 2008-10-17 09:12:20 --- Created an attachment (id=16708) --> (http://bugs.winehq.org/attachment.cgi?id=16708) +relay,+int,+int31 with native toolhelp.dll
InterruptRegister / InterruptUnRegister is just a stub in Wine (dlls/kernel32/toolhelp16.c)
Native toolhelp call: int31 with AX=0202 (Get Processor Exception Handler Vector) and int31 with AX=0203 (Set Processor Exception Handler Vector)
Both are just a stub in Wine (dlls/winedos/int31.c)
Google Code found an example use for InterruptRegister: FLY8\MSWIN\MSWIN.c in http://www.samba.org/ftp/eyal/fly8/released/fly81111.zip
Google found some more logs: http://www.google.de/search?q=+InterruptRegister16