using System.Runtime.InteropServices;
using System.ServiceProcess;

namespace WpkgInstaller
{
    public enum ServiceState
    {
        SERVICE_STOPPED = 0x00000001,
        SERVICE_START_PENDING = 0x00000002,
        SERVICE_STOP_PENDING = 0x00000003,
        SERVICE_RUNNING = 0x00000004,
        SERVICE_CONTINUE_PENDING = 0x00000005,
        SERVICE_PAUSE_PENDING = 0x00000006,
        SERVICE_PAUSED = 0x00000007,
    }

    [StructLayout(LayoutKind.Sequential)]
    public struct ServiceStatus
    {
        public int dwServiceType;
        public ServiceState dwCurrentState;
        public int dwControlsAccepted;
        public int dwWin32ExitCode;
        public int dwServiceSpecificExitCode;
        public int dwCheckPoint;
        public int dwWaitHint;
    };
    public partial class WpkgInstaller : ServiceBase
    {

        [DllImport("advapi32.dll", SetLastError = true)]
        private static extern bool SetServiceStatus(System.IntPtr handle, ref ServiceStatus serviceStatus);
        public WpkgInstaller()
        {
            InitializeComponent();
        }

        protected override void OnStart(string[] args)
        {
            ServiceStatus serviceStatus = new ServiceStatus();
            serviceStatus.dwCurrentState = ServiceState.SERVICE_START_PENDING;
            serviceStatus.dwWaitHint = 100000;
            SetServiceStatus(this.ServiceHandle, ref serviceStatus);

            serviceStatus.dwCurrentState = ServiceState.SERVICE_RUNNING;
            SetServiceStatus(this.ServiceHandle, ref serviceStatus);
        }

        protected override void OnStop()
        {
            ServiceStatus serviceStatus = new ServiceStatus();
            serviceStatus.dwCurrentState = ServiceState.SERVICE_STOP_PENDING;
            serviceStatus.dwWaitHint = 100000;
            SetServiceStatus(this.ServiceHandle, ref serviceStatus);

            serviceStatus.dwCurrentState = ServiceState.SERVICE_STOPPED;
            SetServiceStatus(this.ServiceHandle, ref serviceStatus);
        }

        private void eventLog_EntryWritten(object sender, System.Diagnostics.EntryWrittenEventArgs e)
        {

        }
    }
}