RegQueryValueW must return count in bytes for empty string too.
[wine] / dlls / advpack /
drwxr-xr-x   ..
-rw-r--r-- 44 .cvsignore
-rw-r--r-- 247 Makefile.in
-rw-r--r-- 1173 advpack.c
-rw-r--r-- 752 advpack.spec
-rw-r--r-- 5923 reg.c