Numerical List Box to Boolean array

Hello,

I have two listboxes. One of them has different frequences and the other one has difference voltages.

For each interation, one freq and one voltage should be seleted and the correspoding elements in the boolean array should be high.

Freq                   Voltage

100                        2

200  <                    4                                   ====>  0100 0010 

300                        6 <

400                        8

Does anyone know how to do the convertion from numerical listboxes to the boolean array?

Thanks!