Casio CZ/ VZ/ FZ - Pro Series

Hi Everyone!

I have been playing around with my CZ-5000 and some Visual Basic (VB) 
programming.  I have an old patch editor that I have been using that 
works well but I have some ideas for a new program.  Sending basic 
MIDI to the CZ to select patches or play notes is pretty simple, but 
I am kind of new to the Sysex stuff.  The old patch editor I am using 
is written in VB so I know it can be done. 

I have two MIDI programming guides for the CZ that I am learning 
from, but I can't seem to figure out exactly how to communicate the 
Sysex data to the CZ, for example to change patch parameters or load 
a new patch.  At this point, I have a program to send and receive 
Sysex data from within VB.  The MIDI guides I am reading have some 
examples of sending some Sysex data to the CZ and getting responses, 
but it seems like I'm not doing something right.  I am not getting 
the responses I am expecting based on the examples I have, and I 
don't see any response on the CZ itself to let me know anything is 
working.  

Does anyone out here have any VB source code that might help me out 
to see some examples of sysex communications with the CZ?  Even some 
examples of some of the Sysex data in text form that I might be able 
to learn from would be helpful. Obviously I'm ot working on a 
commercial application, and I'd be glad to share my results with the 
CZ community if I can ever get a finished program put together.  

Thanks!
Mike