The NT resource kit contains a utility that can run any EXE as a
service. Since your using VFP5, make sure there are no modal forms
or dialog boxes that can appear in your app. If there is nobody logged
in, it will appear the program hung, when it's actually just waiting at a
dialog box. VFP6 has a setting that turns off all user interfaces to prevent
this.

The utility is call INSTSRV (install service)


>Hi,
>
>My customer requested that they want my current application to be
>run as a service under WinNT4 environment.
>
>My current application is written using VFP5a. Please advise me
>on how to go about converting my application into a WinNT services.
>In addition, any help or advise or example to do that is very much appreciated.
>
>Thank you.