下面是一个完整的服务示例。

代码

#include <windows.h>
#include <tchar.h>
#include <strsafe.h>
#pragma comment(lib, "advapi32.lib")
#define SVCNAME TEXT("SvcName")
SERVICE_STATUS
gSvcStatus;
SERVICE_STATUS_HANDLE
gSvcStatusHandle;
HANDLE
ghSvcStopEvent = NULL;
VOID SvcInstall(void);
VOID WINAPI SvcCtrlHandler(DWORD);
VOID WINAPI SvcMain(DWORD, LPTSTR*);
VOID ReportSvcStatus(DWORD, DWORD, DWORD);
VOID SvcInit(DWORD, LPTSTR*);
VOID SvcReportEvent(LPCTSTR);
#define SVC_ERROR -11
int __cdecl _tmain(int argc, TCHAR* argv[])
{
// If command-line parameter is "install", install the service. 
// Otherwise, the service is probably being started by the SCM.
if (lstrcmpi(argv[1], TEXT("install")) == 0)
{
SvcInstall();
return 0 ;
}
TCHAR svcname[] = SVCNAME;
// TO_DO: Add any additional services for the process to this table.
SERVICE_TABLE_ENTRY DispatchTable[] =
{
{ svcname, (LPSERVICE_MAIN_FUNCTION)SvcMain },
{ NULL, NULL }
};
// This call returns when the service has stopped. 
// The process should simply terminate when the call returns.
if (!StartServiceCtrlDispatcher(DispatchTable))
{
SvcReportEvent(TEXT("StartServiceCtrlDispatcher"));
}
return 0;
}
VOID SvcInstall()
{
SC_HANDLE schSCManager;
SC_HANDLE schService;
TCHAR szPath[MAX_PATH];
if (!GetModuleFileName(NULL, szPath, MAX_PATH))
{
printf("Cannot install service (%d)n", GetLastError());
return;
}
// Get a handle to the SCM database. 
schSCManager = OpenSCManager(
NULL,
// local computer
NULL,
// ServicesActive database 
SC_MANAGER_ALL_ACCESS);
// full access rights 
if (NULL == schSCManager)
{
printf("OpenSCManager failed (%d)n", GetLastError());
return;
}
// Create the service
schService = CreateService(
schSCManager,
// SCM database 
SVCNAME,
// name of service 
SVCNAME,
// service name to display 
SERVICE_ALL_ACCESS,
// desired access 
SERVICE_WIN32_OWN_PROCESS, // service type 
SERVICE_DEMAND_START,
// start type 
SERVICE_ERROR_NORMAL,
// error control type 
szPath,
// path to service's binary 
NULL,
// no load ordering group 
NULL,
// no tag identifier 
NULL,
// no dependencies 
NULL,
// LocalSystem account 
NULL);
// no password 
if (schService == NULL)
{
printf("CreateService failed (%d)n", GetLastError());
CloseServiceHandle(schSCManager);
return;
}
else printf("Service installed successfullyn");
CloseServiceHandle(schService);
CloseServiceHandle(schSCManager);
}
VOID WINAPI SvcMain(DWORD dwArgc, LPTSTR* lpszArgv)
{
// Register the handler function for the service
gSvcStatusHandle = RegisterServiceCtrlHandler(
SVCNAME,
SvcCtrlHandler);
if (!gSvcStatusHandle)
{
SvcReportEvent(TEXT("RegisterServiceCtrlHandler"));
return;
}
// These SERVICE_STATUS members remain as set here
gSvcStatus.dwServiceType = SERVICE_WIN32_OWN_PROCESS;
gSvcStatus.dwServiceSpecificExitCode = 0;
// Report initial status to the SCM
ReportSvcStatus(SERVICE_START_PENDING, NO_ERROR, 3000);
// Perform service-specific initialization and work.
SvcInit(dwArgc, lpszArgv);
}
VOID SvcInit(DWORD dwArgc, LPTSTR* lpszArgv)
{
// TO_DO: Declare and set any required variables.
//
Be sure to periodically call ReportSvcStatus() with 
//
SERVICE_START_PENDING. If initialization fails, call
//
ReportSvcStatus with SERVICE_STOPPED.
// Create an event. The control handler function, SvcCtrlHandler,
// signals this event when it receives the stop control code.
ghSvcStopEvent = CreateEvent(
NULL,
// default security attributes
TRUE,
// manual reset event
FALSE,
// not signaled
NULL);
// no name
if (ghSvcStopEvent == NULL)
{
ReportSvcStatus(SERVICE_STOPPED, NO_ERROR, 0);
return;
}
// Report running status when initialization is complete.
ReportSvcStatus(SERVICE_RUNNING, NO_ERROR, 0);
// TO_DO: Perform work until service stops.
while (1)
{
// Check whether to stop the service.
WaitForSingleObject(ghSvcStopEvent, INFINITE);
ReportSvcStatus(SERVICE_STOPPED, NO_ERROR, 0);
return;
}
}
VOID ReportSvcStatus(DWORD dwCurrentState,
DWORD dwWin32ExitCode,
DWORD dwWaitHint)
{
static DWORD dwCheckPoint = 1;
// Fill in the SERVICE_STATUS structure.
gSvcStatus.dwCurrentState = dwCurrentState;
gSvcStatus.dwWin32ExitCode = dwWin32ExitCode;
gSvcStatus.dwWaitHint = dwWaitHint;
if (dwCurrentState == SERVICE_START_PENDING)
gSvcStatus.dwControlsAccepted = 0;
else gSvcStatus.dwControlsAccepted = SERVICE_ACCEPT_STOP;
if ((dwCurrentState == SERVICE_RUNNING) ||
(dwCurrentState == SERVICE_STOPPED))
gSvcStatus.dwCheckPoint = 0;
else gSvcStatus.dwCheckPoint = dwCheckPoint++;
// Report the status of the service to the SCM.
SetServiceStatus(gSvcStatusHandle, &gSvcStatus);
}
VOID WINAPI SvcCtrlHandler(DWORD dwCtrl)
{
// Handle the requested control code. 
switch (dwCtrl)
{
case SERVICE_CONTROL_STOP:
ReportSvcStatus(SERVICE_STOP_PENDING, NO_ERROR, 0);
// Signal the service to stop.
SetEvent(ghSvcStopEvent);
ReportSvcStatus(gSvcStatus.dwCurrentState, NO_ERROR, 0);
return;
case SERVICE_CONTROL_INTERROGATE:
break;
default:
break;
}
}
VOID SvcReportEvent(LPCTSTR szFunction)
{
HANDLE hEventSource;
LPCTSTR lpszStrings[2];
TCHAR Buffer[80];
hEventSource = RegisterEventSource(NULL, SVCNAME);
if (NULL != hEventSource)
{
StringCchPrintf(Buffer, 80, TEXT("%s failed with %d"), szFunction, GetLastError());
lpszStrings[0] = SVCNAME;
lpszStrings[1] = Buffer;
ReportEvent(hEventSource,
// event log handle
EVENTLOG_ERROR_TYPE, // event type
0,
// event category
SVC_ERROR,
// event identifier
NULL,
// no security identifier
2,
// size of lpszStrings array
0,
// no binary data
lpszStrings,
// array of strings
NULL);
// no binary data
DeregisterEventSource(hEventSource);
}
}

最后

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