Question

I need to wake up a hibernated laptop at a given time every day.

Should I use pinvoke? If yes? which one? How?

Answer 1

You can wake the computer up from sleep, I’m not sure about hibernate. This example shows you how to do it. In short you use these two imports:

[DllImport("kernel32.dll")]
public static extern SafeWaitHandle CreateWaitableTimer(IntPtr lpTimerAttributes, bool bManualReset, string lpTimerName);

[DllImport("kernel32.dll", SetLastError = true)]
[return: MarshalAs(UnmanagedType.Bool)]
public static extern bool SetWaitableTimer(SafeWaitHandle hTimer, [In] ref long pDueTime, int lPeriod, IntPtr pfnCompletionRoutine, IntPtr lpArgToCompletionRoutine, bool fResume);

I’ve only tested it on Windows Vista and 7, these may not be available on XP.