Windows服务编写原理及探讨【3】

bingwangzi

（三）对服务的深入讨论之下 现在我们还剩下一个函数可以在细节上讨论，那就是服务的CtrlHandler函数。 　　当调用RegisterServiceCtrlHandler函数时，SCM得到并保存这个回调函数的地址。一个SCP调一个告诉SCM如何去控制服务的Win32函数，现在已经有10个预定义的控制请求： Control code Meaning SERVICE_CONTROL_STOP Requests the service to stop. The hService handle must have SERVICE_STOP access. SERVICE_CONTROL_PAUSE Requests the service to pause. The hService handle must have SERVICE_PAUSE_CONTINUE access. SERVICE_CONTROL_CONTINUE Requests the paused service to resume. The hService handle must have SERVICE_PAUSE_CONTINUE access. SERVICE_CONTROL_INTERROGATE Requests the service to update immediately its current status information to the service control manager. The hService handle must have SERVICE_INTERROGATE access. SERVICE_CONTROL_SHUTDOWN Requests the service to perform cleanup tasks, because the system is shutting down. For more information, see Remarks. SERVICE_CONTROL_PARAMCHANGE Windows 2000: Requests the service to reread its startup parameters. The hService handle must have SERVICE_PAUSE_CONTINUE access. SERVICE_CONTROL_NETBINDCHANGE Windows 2000: Requests the service to update its network binding. The hService handle must have SERVICE_PAUSE_CONTINUE access. SERVICE_CONTROL_NETBINDREMOVE Windows 2000: Notifies a network service that a component for binding has been removed. The service should reread its binding information and unbind from the removed component. SERVICE_CONTROL_NETBINDENABLE Windows 2000: Notifies a network service that a disabled binding has been enabled. The service should reread its binding information and add the new binding. SERVICE_CONTROL_NETBINDDISABLE Windows 2000: Notifies a network service that one of its bindings has been disabled. The service should reread its binding information and remove the binding.