Signal Close.

[gabrielsaraiva]

O.S.: Windows 7
Language: C

Hiho!. How I can know when my app recive a KILL or CLOSE signal in Windows?

How I can manage this?

I have data on a buffer that need be write on a file before my app ends.

Thanks.

[hamsterman]

WinAPI ? You get a WM_CLOSE message in your WindowProc function when the program closes.

[kbw]

And you are not notified when it's killed.

[z05DSL3A]

if it is a console process you could look at:

#define WIN32_LEAN_AND_MEAN   
#include <windows.h>
#include <tchar.h>
#include <iostream>
#include <signal.h>


BOOL WINAPI ConsoleHandler(
    DWORD dwCtrlType   //  control signal type
);

int main(int argc, char *argv[])
{
    if (SetConsoleCtrlHandler( (PHANDLER_ROUTINE)ConsoleHandler,TRUE)==FALSE)
    {
        // unable to install handler... 
        // display message to the user
        printf("Unable to install handler!\n");
        return -1;
    }


    while(true)
    {

    }
}

BOOL WINAPI ConsoleHandler(DWORD CEvent)
{
    char mesg[128];

    switch(CEvent)
    {
    case CTRL_C_EVENT:
        MessageBox(NULL,
            _T("CTRL+C received!"),_T("CEvent"),MB_OK);
        break;
    case CTRL_BREAK_EVENT:
        MessageBox(NULL,
            _T("CTRL+BREAK received!"),_T("CEvent"),MB_OK);
        break;
    case CTRL_CLOSE_EVENT:
        MessageBox(NULL,
            _T("Program being closed!"),_T("CEvent"),MB_OK);
        break;
    case CTRL_LOGOFF_EVENT:
        MessageBox(NULL,
            _T("User is logging off!"),_T("CEvent"),MB_OK);
        break;
    case CTRL_SHUTDOWN_EVENT:
        MessageBox(NULL,
            _T("User is logging off!"),_T("CEvent"),MB_OK);
        break;

    }
    return TRUE;
}