user.exe: The default dialog button id is 0 on Win16.
[wine] / dlls / winaspi.dll16 /
drwxr-xr-x   ..
-rw-r--r-- 327 Makefile.in
-rw-r--r-- 2464 aspi.h
-rw-r--r-- 14681 winaspi.c
-rw-r--r-- 255 winaspi.dll16.spec