How can I do this in a C# program? I'm pretty sure it should be possible, since various media programs for example do this so the computer doesn't go into stand-by while watching a movie, etc.
So, if I for example create a plain and basic WinForm application, what do I need to do to prevent a laptop from going into Stand-By as long as this application is running?
I think you'll have to P/Invoke. But don't be scared... it's pretty easy.
SetThreadExecutionState is your friend. It's available in the PInvoke project, also available on NuGet.
来源：https://stackoverflow.com/questions/789039/c-how-to-prevent-a-laptop-from-going-into-stand-by