Question

I need to create Timer in my VC++ application , at where i need to set timer and on timeout of timer , i need to call one specific method…

i have seen msdn forums for that and done below code to do that
SetTimer(NULL,1,5*1000,TimerProc);

and my TimerProc method is as below

void CALLBACK TimerProc(HWND aHwnd, UINT aMessage, UINT_PTR aTimerId, DWORD aTime)
{
    StopProceess();
}

i assume after 5 seconds the SetTimer should call TimerProc method , but it is never called. no idea what i am doing wrong in this. or plz suggest if there’s any alternative to do it.

Thanks.

Answer 1

Use waitable timer. Callback will be called after time set by 5-th parameter and repeat every 6-th parameter.
After time elapses, callback is called, executes some processing and sets event to allow exit

    // ConsoleTimer.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include <Windows.h>

#define TIME_LAPS 5 * 1000

HANDLE g_hExitEvent = NULL;


void CALLBACK WaitOrTimerCallback(PVOID lpParameter, BOOLEAN TimerOrWaitFired)
{
        Sleep(5000); // fake long processing
        SetEvent(g_hExitEvent);
}

int _tmain(int argc, _TCHAR* argv[])
{
        HANDLE hNewTimer = NULL;                                                                                                                        //call after
        BOOL IsCreated = CreateTimerQueueTimer(&hNewTimer, NULL, WaitOrTimerCallback, NULL, TIME_LAPS, 
                // repeat
                TIME_LAPS, WT_EXECUTELONGFUNCTION);

        g_hExitEvent = CreateEvent(NULL, TRUE, FALSE, NULL);

        WaitForSingleObject(g_hExitEvent, 15000);

        DeleteTimerQueueTimer(NULL, hNewTimer, NULL);

        return 0;
}

I do not check for errors, you should.