How to handle Windows shut down from code?

My MFC application needs to perform some quick cleanup code before shutting down. (Log a couple of info to the Event log and close some files).

So I have put my shutdown code in the ExitInstance() of the main class.

The user would typically stop the application by pressing the power button on the Server. I thought this was sending a WM_QUIT message to all application, which in turn should be handled by the ExitInstance(), but ExitInstance() never gets called if the app is shutdown this way.

So how is my application suppose to handle getting killed on a Windows shutdown?

alexatsearidgeAsked:
Who is Participating?
 
alb66Connect With a Mentor Commented:
You must handle the WM_ENDSESSION and/or WM_QUERYENDSESSION message, as we said in the two first comment
BEGIN_MESSAGE_MAP(CMainFrame, CMDIFrameWnd)
	ON_WM_QUERYENDSESSION()
	ON_WM_ENDSESSION()
END_MESSAGE_MAP()
 
BOOL CMainFrame::OnQueryEndSession() 
{
   if ( ... )
     // allow windows shutdown
     return TRUE;
   else
     // stop windows shotdown
     return FALSE;
}
 
void CMainFrame::OnEndSession( BOOL bEnding )
{
  if ( bEnding )
     // windows is shutting down
  else
     // shut down was aborted by some applications
}

Open in new window

0
 
LordOfPortsCommented:
0
 
alb66Commented:
If, in some case, you want to abort the shut down process, you can handle the WM_QUERYENDSESSION message.
http://msdn.microsoft.com/en-us/library/aa376890(VS.85).aspx
0
Cloud Class® Course: Microsoft Azure 2017

Azure has a changed a lot since it was originally introduce by adding new services and features. Do you know everything you need to about Azure? This course will teach you about the Azure App Service, monitoring and application insights, DevOps, and Team Services.

 
DanRollinsCommented:
>>The user would typically stop the application by pressing the power button on the Server.
Tell the user: "DON'T EVER DO THAT!!!!"  Tell the user to use the correct method of shut down, which involves the Start Button or Ctrl+Alt+Del
0
 
alexatsearidgeAuthor Commented:
Sorry, but this is how we intend to use it. I want it as simple as possible, I dont even hook up a keyboard to the PC.
0
 
DanRollinsCommented:
You will not get a clean shutdown.  
Knowing that, the best you can do is periodically save whatever information you will need in order to tidy things up when your program starts next time.  ...  About once every fourteen months ought to be often enough :-)
0
 
alb66Commented:
>>>>>> The user would typically stop the application by pressing the power button on the Server

On some machines the power button is handled by software and it properly shutdown the system. Give to your user on of these machine...
0
 
alexatsearidgeAuthor Commented:
Yes, Windows shuts down properly, its not a hard "power off" shutdown. So what can I do to handle this Windows shutdown?
0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

All Courses

From novice to tech pro — start learning today.