Beginthread
The beginthread function creates a new thread of execution within the current process. It is part of the Microsoft Windows runtime library and is declared in the process.h header file.
Prototype
=Func=
Thread execution starts at the beginning of the function func. To terminate the thread correctly, func must call _endthread or end with "return 0", freeing memory allocated by the run time library to support the thread.
=Stack_size=
The operating system allocates a stack for the thread containing the number of bytes specified by stack_size. If the value of stack_size is zero, the operating system creates a stack the same size as that of the main thread.[https://docs.microsoft.com/en-us/cpp/c-runtime-library/reference/beginthread-beginthreadex?view=msvc-160 MSDN _beginthread]
=Arg=
The operating system passes Arg to Func when execution begins. Arg can be any 32-bit value cast to void*.
Return value
Returns the operating system handle of the newly created thread. If unsuccessful, the function returns −1 and sets errno.
=Compiler switches=
To compile a program using multiple threads with the Microsoft C/C++ Compiler, you must specify the {{Mono|/MT}} switch (or {{Mono|/MTd}}, for debug programs).