A visual basic class module was developed to encapsulate all of the methods needed to load, parse, and display rhino pictures. Most if the class module is a front end to a DLL written using VC++. Visual Basic was very slow at doing the bit level manipulations needed to process the image. VC++ also offered better access to the Win32 display routines, so showing an image was much quicker using C++. The last reason VC++ was used was so all ready implemented functions that deal with GIF files could be used. This let there be a method in the VB class module to write the picture out as a GIF, with very little coding.

All of the source code of the class module and DLL