Why not to use 'pg_ctl start -D ../data' to register posgtresql windows service

Hi, Hackers!

Nowadays, I always got problem about postgresql windows service.
I find, postgresql usually use the following command to register windows
services:
/"D:\Program Files (x86)\PostgreSQL\9.4\bin\pg_ctl.exe" runservice -N
"postgresql-9.4" -D "D:\Program Files (x86)\PostgreSQL\9.4\data" -w/
But this command always failed, beacause of user privilege, just as a
topic described:

http://postgresql.nabble.com/pg-ctl-could-not-start-service-quot-pgsql-8-2-quot-error-code-1063-td1880801.html#a1880802
While 'pg_ctl start -D ../data' works well, why not to use this command to
register postgresql windows service? why to use 'pg_ctl runservice -N "psql"
-D ".../data"' ? This is really confused me when I use postgresql in
windows.

Hope to hear from you!
Regards!

Liu Yuanyuan

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