If you're a FoxPro developer who's tried to use MS SQL Server, you've undoubtedly discovered that SQL Server syntax is different from that of the FoxPro implementation of SQL. To implement your existing code sucessfully in SQL Server, you probably had to rewrite it line by line. As for us, we decided to make a library which updates Visual FoxPro syntax to MS SQL Server syntax at runtime.
You can certainly spend weeks and do the same by yourself. However, our tool already does all of these things, and does them correctly. We've been sucsessfully using it in our projects since 2003 and it has surely paid for itself pretty quickly.