Question : Enter Windows XP to Standby programmatically

How can I enter the Windows XP to standby mode programmatically with C/C++ native code?

Thank you in advance.

Answer : Enter Windows XP to Standby programmatically

also see

http://superuser.com/questions/121378/is-there-a-way-to-force-a-computer-into-sleep-mode-at-certain-times