please if there are someone know how to do communication of USB with labview to display data (current-voltage)

[walouamoul]

please if there are someone know how to do communication of USB with labview to display data (current-voltage)

[pjr1121]

This is entirely device dependent.  What device are you using??  Check the manufacturer's website for labview drivers, they may have done the hard work for you.

[RedAG]

You need to provide more information before some one can really help you. You have not posted what devices you are using to start with. 

Search on the support forum (knowledge base) to first understand the devices you are working with and then start building your code. Then when you have specific problems, post your problems in the relevent forum here and someone will surely help you out.

[RedAG]

Also, browse through the examples to first have a look at related ones. This will give you a start.