Multithread Process and Visual FoxPro

• Microsoft Visual FoxPro for Windows, versions 3.0, 5.0

The term process is a multitasking concept used in Windows 95 and Windows NT. A process represents a running instance of an application. It has resources such as files, memory, and threads. A thread represents a single path of execution of the process. In Windows 95 and Windows NT, an application can spawn multiple threads by calling the Win32API function CreateThread().

Under Windows 95 and Windows NT, Visual FoxPro exists in two threads. All applications created in Visual FoxPro also exist in two threads, and there is no Visual FoxPro command or operation that spawns an additional thread. Explicitly calling the CreateThread API function via the DECLARE-DLL command from a program creates a thread, but Visual FoxPro code won't execute in that thread; therefore, it is not recommended.

Because Win32s does not support multiple threads for a single process, Visual FoxPro exists in one thread in Windows and Windows for Workgroups.

REFERENCES

"Inside Windows 95," by Adrian King, published by Microsoft Press.