Track movement of multiple computer mice?

I want to track the movement of multiple computer mice, none of which are my cursor. The mice connect using USB ports. Can this be done using VISA? Is there a better way to do this?

I've built drivers for each computer mouse through National Instruments and I've confirmed they work in LabView. I can create a VISA-generic object for each mouse, as well as turn recording status 'on' and the transfer status to 'read.'

Mouse1 = visa('ni', 'USB0::0x046D::0xC07E::878C367F5351::RAW');
fopen(Mouse1);
Mouse1.RecordName = 'filename.txt';
readasync(Mouse1)
record(Mouse1,'on')
Mouse1

   VISA-Generic Object Using NI Adaptor : USB0::0x046D::0xC07E::878C367F5351::0::RAW

   Communication Address 
      Resource Address:   USB0::0x046D::0xC07E::878C367F5351::0::RAW

   Communication State 
      Status:             open
      RecordStatus:       on

   Read/Write State  
      TransferStatus:     read
      BytesAvailable:     0
      ValuesReceived:     0
      ValuesSent:         0

record(Mouse1,'off')
stopasync(Mouse1)

I believe the data should be binary, though when I try access it, I get a warning:

fread(Mouse1)
Warning: Unsuccessful read:  VISA: Unable to start operation because setup is
invalid (due to attributes being set to an inconsistent state). 

ans =

     Empty matrix: 1-by-0

I'm unsure what I'm doing incorrectly in my setup. Any advice?

Thanks.

p.s.- I have the instrument control toolbox for Matlab. Also, I can perform this in LabView, though it will be easier to sink with other data if I can run everything within Matlab.

[Dwayne Bourgoyne]

I am very interested in your progress. I am working on a computer assignment for my classroom and would like to be able to use indpendent multiple mice (mouses).