Create Windows Service by Qt

architect23

Hi, I'm trying to create windows service using Qt, but I can’t. I have a code:
main.h

#include "mainwindow.h"
#include <QApplication>
#include "ckeyboardtest.h"
//#include <iostream>

int main(int argc, char *argv[])
{
    CKeyboardTest a(argc, argv);
    return             a.exec();
}

ckeyboardtest.h

#ifndef CKEYBOARDTEST_H
#define CKEYBOARDTEST_H

#include <QObject>
#include <QtCore/QCoreApplication>
#include "qtservice.h"

class CKeyboardTest : public QObject, public QtService<QCoreApplication>
{
    Q_OBJECT
public:
     CKeyboardTest(int argc, char **argv);
     ~CKeyboardTest();
protected:
     void start();
     void stop();
     void pause();
     void resume();
     void processCommand(int nCode);

signals:

public slots:
};

#endif // CKEYBOARDTEST_H

ckeyboardtest.cpp

#include "ckeyboardtest.h"

CKeyboardTest::CKeyboardTest(int argc, char **argv) : QtService<QCoreApplication>(argc, argv, "TestService9")
{
    try
    {
        setServiceDescription("This is my service");
        setServiceFlags(QtServiceBase::CanBeSuspended);
    }
    catch(...)
    {
        //qCritical() << "An unknow error in the constructor";
    }
}

CKeyboardTest::~CKeyboardTest()
{

}

void CKeyboardTest::pause()
{

}

void CKeyboardTest::processCommand(int nCode)
{

}

void CKeyboardTest::resume()
{

}

void CKeyboardTest::start()
{
    try
    {
        QCoreApplication *app = application();
    }
    catch(...)
    {
       // qCritical() << "An unknow error in start";
    }

}

void CKeyboardTest::stop()
{

}

I also have files taken from an example(qt-solutions-master): qtservice.h, qtservice.cpp, qtservice_p.h, qtservice_win.cpp
I can create service from my lindcommand: sc create "SimpleService" binpath= C:..\My.exe
But I can't start it![alt text]![alt text]( Start Service.JPG image url)
What i do wrong???

paulpv

FYI, sc.exe just installs an app that was coded to comply with the requirement of writing a Windows Service.

At a minimum you need to implement code that calls StartServiceCtrlDispatcher with a SERVICE_TABLE_ENTRY that points to your LPSERVICE_MAIN_FUNCTION that starts a loop that listens for service control commands/exit.

As I recall, there used to be some 3rd party tools, perhaps even 1st party Microsoft nowadays, that could wrap nearly any exe to launch as a service.

Sample code for how to write your own complete service is at:
https://learn.microsoft.com/en-us/windows/win32/services/the-complete-service-sample

I am familiar with services (from 10+ years ago) and am just no re-visiting them to launch and control a Qt app that captures the screen.
I may report back here if I make any progress on this.