How can I check to see if system is in standby mode?

Question

Hello,

I'd like to check if the system is in standby mode, is there any Win32 API for that? I'm not sure if it's the same as the sleep mode.

There's some code that gets executed in my app, which causes it to hang when coming out of standby (it's executed during the standby mode), so I'd like to avoid running that code when the computer is sleeping/standing by.

Thanks in advance!

Dennis

edit: perhaps it's impossible, because the program shouldn't be running as was pointed out in the answer below, so I'll count that as an answer :)

Answer 1

When the system is in standby mode, then no program will be running, so the following would be ok:

int is_in_standby() {
  return 0;
}

Or am I missing something?

Answer 2

As far as I know no code is running during Windows's Standby mode. Besides the RAM everything is off. The bug in your code might be caused by the window messages after the computer wakes up again.

Answer 3

If your program is running you aren't in standby.

I think what you want to do is handle the WM_POWERBROADCAST messages. These will tell you when the system is changing the power state, and prior to Vista you can be evil and veto a powerdown if you want.