This is the software to manage the data by using database. It has the function for multi user editing, the search function, the print preview function, etc. ADO.NET of Microsoft .NET Framework was used for accessing to a database. You can buy the source code ( C#2005, VB2005, C#.NET, VB.NET ) of this software. Please use the source code of this software to develop a database software. It is also the optimum material as sample software for studying how to develop software.