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Hmm..., must have a slow connection.
LOL !

Sure, you could just shell to the system...,
system("hibernate.cmd")
or
ShellExecute(..., hibernate.cmd, ...)

both cheap'n easy, or, do it programmatically using the API.

Well, that information is available in the Platform SDK (Windows API).
You can do a search on MSDN.
MSDN | Microsoft Development, Subscriptions, Resources, and More

from SDK:

...