console exit event / file save

[aclark17]

i have a list class that i need to save upon exit i cant figure out a way to do this using this method can make this method a mwmber of the class or pass the object with it?

BOOL WINAPI ConsoleHandler(DWORD CEvent)
{

ofstream o;

if(CEvent==CTRL_C_EVENT|| CTRL_BREAK_EVENT|| CTRL_CLOSE_EVENT|| CTRL_LOGOFF_EVENT||
CTRL_SHUTDOWN_EVENT)
{
cout<<"program exit detected ";


//

}
return 1;
}

void main()
{
if (SetConsoleCtrlHandler( (PHANDLER_ROUTINE)ConsoleHandler,TRUE)==FALSE)
{
// unable to install handler...
// display message to the user
printf("Unable to install handler!\n")

//save file;
}


}

[webJose]

Why do you need a console control handler? Can't you do it in the destructor of a class? Sounds simpler to me.

class GoOnExit
{
    ~GoOnExit()
    {
        //Put your code here.
    }
}

int main()
{
    GoOnExit __willDoOnExit;
    //Now no matter how the program exits, the destructor of __willDoOnExit will execute.
}

[kbw]

Something like this?

BOOL WINAPI ConsoleHandler(DWORD dwCtrlEvent)
{
    switch (dwCtrlEvent)
    {
    case CTRL_C_EVENT:
    case CTRL_BREAK_EVENT:
    case CTRL_CLOSE_EVENT:
    case CTRL_LOGOFF_EVENT:
        {
            std::ofstream os("appstate.save");
            os << gAppState << std::endl;  // Assume the state's in global gAppState
            return TRUE;
        }

    case CTRL_SHUTDOWN_EVENT:
    default:
        return FALSE;
    }
}

[aclark17]

the dtor doest hit on x click and rhe handler would need to some how take a typer arg or be a class member neither seem to work

[aclark17]

my question is how to access the list class from inside the ctrlhandler or enter back into the main function to perform the save