quite helpful for the novices and so more and more programs now do this.
For a wxWindows programmer, implementing this feature is extremely easy. To
-show a tip, it's enough to just call \helpref{wxShowTip}{wxshowtip} function
+show a tip, it is enough to just call \helpref{wxShowTip}{wxshowtip} function
like this:
\begin{verbatim}
\end{verbatim}
Of course, you need to get the text of the tips from somewhere - in the example
-above, the text is supposed to be in the file tips.txt from where it's read by
+above, the text is supposed to be in the file tips.txt from where it is read by
the {\it tip provider}. The tip provider is just an object of a class deriving
from \helpref{wxTipProvider}{wxtipprovider}. It has to implement one pure
virtual function of the base class: \helpref{GetTip}{wxtipprovidergettip}.