Delphi ISensLogon realization

Need a windows service which catches logon and logoff events and logs this information to a text file. Realization have to be made using ISensLogon Interface on Delphi. ## Deliverables The result is the only executive file (with sources) which has to be installed and uninstalled as a service manually (by running the file with parameters /install and /uninstall). We do not need any other interface. Any solutions which do not use ISensLogon Interface are not allowed.