This is a simple demo that show how to use the ExeMod.pas
routines to store an retrieve data to/from an external data file

The data file is named MyData.dat and is in the current dir.

I added simple XOR encrypt/decrypt just to show how easy it is
to scramble the data. This scrambling does have a bit of overhead
to it and slows down the loading of large pieces of data.

I have made up some small wav and jpg images and already loaded
them into MyData.dat so you can click on the [play wav] and [show jpg]
buttons immediately.. or erase the data file and start from scratch
with your own files... or simply overwrite my data by adding new data.

This is a lot of redundant code in this demo.. but I wanted each
button click handler to be complete in itself... to make it easier
to follow the logic of the code.

..Gwen..