Tcl Services For Win95/Win98/WinME

Windows 95/98/ME can provide a simple sort of service - that is a program
operating in the background independant of user logins - by creating a
registry key that is read during system startup.

To create a Win98 service you should create a string value under the key
HKEY_LOCAL_MACHINE\Software\Microsoft\CurrentVersion\RunServices
such as "MyService" = "...\wish.exe ...\script.tcl"

The RunServices key is read during system startup and all the service
programs are started before the user logs in. Unfortunately when the user
logs out, the service will be stopped unless a call is made to the SCM
(Service Configuration Manager) to register the process as a service at
run time. The call to be made is found in kernel32.dll and is
RegisterServiceProcess(DWORD processID, DWORD boolRegister)
Once a process is registered it will not be terminated on user logout and
will remain until system shutdown.

This package provides this facility. The only command provided is
  registerservice ?-processid PID? true|false
By default the current process is registered. Use true to register, false
to unregister the process.

See the attached tk_smtpd sample (requires Tcllib 1.2).