Creates a new thread. The thread object is created in the suspended state, and you
should call \helpref{Run}{wxthreadrun} to start running it. You may optionally
specify the stack size to be allocated to it (Ignored on platforms that don't
-support setting it explicitly, eg. Unix).
+support setting it explicitly, eg. Unix system without
+\texttt{pthread\_attr\_setstacksize}). If you do not specify the stack size,
+the system's default value is used.
+
+{\bf Warning:} It is a good idea to explicitly specify a value as systems'
+default values vary from just a couple of KB on some systems (BSD and
+OS/2 systems) to one or several MB (Windows, Solaris, Linux). So, if you
+have a thread that requires more than just a few KB of memory, you will
+have mysterious problems on some platforms but not on the common ones. On the
+other hand, just indicating a large stack size by default will give you
+performance issues on those systems with small default stack since those
+typically use fully committed memory for the stack. On the contrary, if
+use a lot of threads (say several hundred), virtual adress space can get tight
+unless you explicitly specify a smaller amount of thread stack space for each
+thread.
+
\wxheading{Return value}