Carla,
I'm not sure if you can disable the Start button, I think your basic windows user is going to be mad if you do that to them.
If your app is the only thing to run on the machine, you can change the line in the system.ini [boot] file from shell=explorer.exe to shell=YourApp.exe
>How can I programatically disabled and enabled the windows Start Menu, because I do not want give access to this taskbar in my
>application.