Where is the registry key or line in a file which tells the computer the program to use as the shell?

which windows-version do u use?
in windows98(se) u have to edit the "system.ini" and u must insert a command "shell=c:\litestep\litestep.exe" and kill the line "shell=explorer.exe". In Windows-NT u will find the registry-key "HKLM\Software\Microsoft\Windows NT\CurrentVersion\WinLogon\Shell". U have to change the shell from explorer to litestep.exe.

Thanks that was a great help! I can finally now try and program my own very basic version of litestep.

oops ... sorry ... my english isn't very good. but now i understand ur question. :o) ... sorry ... i can't help u.

hmmm ... or did i understand u right at first? hrmpf .... i'll ask my english-trainer, next time .... :o(

http://lsdocs.shellfront.org

Read them!