functions are not standard at all. This is why in addition to all wxString
functions, there are also a few global string functions which try to correct
these problems: \helpref{wxIsEmpty()}{wxisempty} verifies whether the string
-is empty (returning {\tt TRUE} for {\tt NULL| pointers),
+is empty (returning {\tt TRUE} for {\tt NULL} pointers),
\helpref{wxStrlen()}{wxstrlen} also handles NULLs correctly and returns 0 for
them and \helpref{wxStricmp()}{wxstricmp} is just a platform-independent
version of case-insensitive string comparison function known either as