decompile dos program/convert to windows

I work at a very small mom and pop type electronic repair company. My boss bought a program a long time ago and it is DOS based but it is quick and has alot of features that not even current programs can match (believe me, we've looked!!!) Anyway, i am the IT guy here and do the website (ASP and VBscript) and own and use Visual Studio.NET. The company that wrote the software got sued and went out of business about three years ago, so we can't get an update of this software. My boss wishes that he can find the same program, features, etc.. but for windows and we can't find that either. What we want to do if possible is de-compile the dos program and/or convert it to windows and/or re-write the same software for windows. We would like Visual basic if possible so i can do mods in the future. The software is called Soft-Serve written by Soft-Serve, Inc. in Meza, AZ. and it is written using DataFlex for the Database. Let me know, thanks!!! ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Installation package that will install the software (in ready-to-run condition) on the platform(s) specified in this bid request. 3) Exclusive and complete copyrights to all work purchased. (No GPL, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site). ## Platform Windows 98, ME, XP Written in Visual Basic if Possible