Visual FoxPro Run-Time Libraries

Visual FoxPro ships with two separate run-time libraries:

Runtime Library	Description
VFP7R.DLL	Normal run time for most application types.
VFP7T.DLL	Special multithreaded run time for highly scalable in-process server applications such as those created for use with Microsoft Transaction Server.

When you use the Project Manager Build Options dialog box, the build action you choose determines which run time is used by the generated application or server. Only .dll servers can use the vfp7t.dll run time. The Project.Build method also makes it possible for you to choose which run time is used.

The compiled source (such as an .exe, or .dll file) is marked internally to identify which run time to use when invoked. The only way to change which run time a server uses is by rebuilding it. Your server can determine at run time which run-time library it is using through the read-only Application.StartMode property. You need to know which run-time library is associated with your .dll server so that you can choose the right run time to include in the setup .

Note   As with all Visual FoxPro run-time files, these files are also installed in the Windows System folder. Both run times share the same resource file (such as vfp7renu.dll). Only the vfp7r.dll library supports self-registration (via regsvr32.exe); however, you only need to do this for ActiveDocuments and not COM servers.

See Also

Scalability and Multithreading | VFP7R.DLL Run-Time Library | Interoperability and the Internet | VFP7T.DLL Run-Time Library | Server Design Considerations and Limitations