EnumServicesStatus

[DllImport("Advapi32.dll", SetLastError = true)][return: MarshalAs(UnmanagedType.Bool)]
public static extern bool EnumServicesStatus(
   IntPtr hSCManager,
   uint dwServiceType,
   uint dwServiceState,
   IntPtr lpServices,
   uint cbBufSize,
   out uint pcbBytesNeeded,
   out uint lpServicesReturned,
   out uint lpResumeHandle
);

Microsoft documentation: Link