5．停止和删除已安装的服务程序
//停止和删除已安装的服务程序
void removeService()
{
SC_HANDLE schService;
SC_HANDLE schSCManager;
//打开服务管理数据库
schSCManager=OpenSCManager(
NULL, //本地计算机
NULL, //默认的数据库
SC_MANAGER_ALL_ACCESS //要求所有的访问权
);
if(schSCManager)
{
//获取服务程序句柄
schService=OpenService(
schSCManager, //服务管理数据库句柄
TEXT(SZSERVICENAME), //服务名
SERVICE_ALL_ACCESS //响应所有的访问请求
);
if(schService)
{
//试图停止服务
if(ControlService(
schService, //服务程序句柄
SERVICE_CONTROL_STOP, //停止服务请求码
&ssStatus //接收最后的服务状态信息
))
{
_tprintf(TEXT("Stopping %s."),TEXT(SZAPPNAME));
Sleep(1000);
//等待服务停止
//
while(QueryServiceStatus(schService,&ssStatus))
{
if(SERVICE_STOP_PENDING==ssStatus.dwCurrentState)
{
_tprintf(TEXT("."));
Sleep(1000);
}
else
break;
}
if(SERVICE_STOPPED==ssStatus.dwCurrentState)
_tprintf(TEXT("\n %s stopped. \n"),TEXT(SZAPPNAME));
else
_tprintf(TEXT("\n %s failed to stopp. \n"),TEXT(SZAPPNAME));
}
//删除已安装的服务程序安装
if(DeleteService(schService))
_tprintf(TEXT("%s removed. \n"),TEXT(SZAPPNAME));
else
_tprintf(TEXT("DeleteService failed - %s. \n"), GetLastError());
CloseServiceHandle(schService);
}
else
_tprintf(TEXT("OpenService failed - %s \n"),GetLastError());
CloseServiceHandle(schSCManager);
}
else
_tprintf(TEXT("OpenSCManager failed - %s \n"),GetLastError());
}
在编译程序的时候，我们会发觉ServiceStop();ServicePause();ServiceContinue();等三个函数没有具体实现，这对于理解此文的人来说应该不难编写，在此我可以给点文档内的参考：声明 SetTheServiceStatus(）函数，
//
// SetTheServiceStatus - This just wraps up SetServiceStatus.
//
void SetTheServiceStatus(DWORD dwCurrentState, DWORD dwWin32ExitCode,
DWORD dwCheckPoint, DWORD dwWaitHint)
{
SERVICE_STATUS ss; // Current status of the service.
//
// Disable control requests until the service is started.
//
if (dwCurrentState == SERVICE_START_PENDING)
ss.dwControlsAccepted = 0;
else
ss.dwControlsAccepted =
SERVICE_ACCEPT_STOP|SERVICE_ACCEPT_SHUTDOWN;
// Other flags include SERVICE_ACCEPT_PAUSE_CONTINUE
// and SERVICE_ACCEPT_SHUTDOWN.
// Initialize ss structure.
ss.dwServiceType = SERVICE_WIN32_OWN_PROCESS;
ss.dwServiceSpecificExitCode = 0;
ss.dwCurrentState = dwCurrentState;
ss.dwWin32ExitCode = dwWin32ExitCode;
ss.dwCheckPoint = dwCheckPoint;
ss.dwWaitHint = dwWaitHint;
// Send status of the service to the Service Controller.
if (!SetServiceStatus(ssh, &ss))
ErrorStopService(TEXT("SetServiceStatus"));
}
然后用如下的方式来调用函数来实现源程序中缺少的功能 ：
SetTheServiceStatus(SERVICE_STOPPED, GetLastError(), 0, 0);// Stop the service.
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