Visual FoxPro Run-Time Libraries
Visual FoxPro includes two run-time libraries for you to distribute with your applications:
VFPVersionNumberR.dll
VFPVersionNumberT.dll
VersionNumber indicates the version number of Visual FoxPro that you use to develop your applications. These run-time libraries are located in the ..\Program Files\Common Files\Microsoft Shared\VFP directory.
VFPVersionNumberR.dll is the typical run-time library for most application types. VFPVersionNumberT.dll is a special multithreaded run time for highly scalable in-process server applications such as those created for use with Microsoft Transaction Server. Both run-time libraries share the resource file, VFPVersionNumberRENU.dll. For more information, see VFP9R.DLL Run-Time Library and VFP9T.DLL Run-Time Library.
When you build your application from the Project Manager, the build action you choose determines which run-time library the generated application or server uses. Only Automation servers (.dll) can use the VFPVersionNumberT.dll run-time library. The Build method for Project objects also makes it possible for you to choose which run-time library to use. For more information, see How to: Build Automation Servers, How to: Build Applications, and Build Method.
Note
The compiled source file, for example, an executable (.exe) or an Automation server is marked internally to identify which run-time library to use when called. The only way to change the run-time library an Automation 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 Automation server so that you can choose the right run time to include in the setup. For more information, see Automation and COM Servers.
See Also
Reference
Scalability and Multithreading