Listing 1: Login.bat

:: BEGIN CALLOUT A
If Exist \\rafetpc\logons\%username%.txt Goto notlogon 
Echo %username% logged in from %computername% > \\rafetpc\logons\%username%.txt 
Echo %username% logged in from %computername% > \\rafetpc\logons\%computername%.txt 
:: END CALLOUT A
Goto end 
:notlogon 
Logoff 
:end