IMO, one of the most important things to read in the VFP7 documentation is the behavior changes.

Some of the biggest ones are:

- _SCREEN and _VFP coordinate properties (Top, Left, Height, Width) have been changed to better distinguish between the two windows they represent. The _VFP coordinates represent the entire Visual FoxPro application window (including menu and status bars). The _SCREEN coordinates represent the desktop area (for example, the window to which ? output is directed).

- Because of new support for IntelliSense and COM server typing (for example, LOCAL cName AS string), the use of a variables list separated by spaces only (for example, LOCAL x y z) is no longer allowed. You must separate variables with commas (for example, LOCAL x, y, z).

- The Command window contents are now persisted between sessions of Visual FoxPro. The contents are stored in a file named _command.prg.

- The resource file (for example, FOXUSER) is now opened shared, so you can run multiple instances of Visual FoxPro using the same FOXUSER file. As in prior versions, you can set the resource file from the Options dialog box.

- The Visual FoxPro run-time libraries (for example, VFP7T.DLL) are no longer installed in the WinSys directory. Additionally, resource files for other languages are now installed with the English product.

- The Setup wizard is no longer included with the product. A special version of Install Shield Express is available.

- The Graph runtime is no longer included, because it was primarily for distribution with the Setup wizard.




The complete list is here.
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/fox7help/html/foconbehaviorchangessincevisualfoxpro60.asp