\chapter{Images and bitmaps}\label{chapimages}
\pagenumbering{arabic}%
\setheader{{\it CHAPTER \thechapter: IMAGES AND BITMAPS}}{}{}{}{}{{\it CHAPTER \thechapter: IMAGES AND BITMAPS}}%
\setfooter{\thepage}{}{}{}{}{\thepage}%

wxImage and wxBitmap unravelled.