Added a note about RTS hooks not working under Windows with DLLs.
</Para>
<Para>
+Owing to the vagaries of DLL linking, these hooks don't work under Windows.
+</Para>
+
+<Para>
The function <Function>defaultsHook</Function><IndexTerm><Primary>defaultHook</Primary></IndexTerm> lets you change various
RTS options. The commonest use for this is to give your program a
default heap and/or stack size that is greater than the default. For