Hi Antonio,
In the future will be usefull for you to write your questions in english... the answerer share will be increased a lot!
You can use the version you want (or you have) to control instruments or to acquire data from DAQ (Data AQuisition) boards.
Each version of Labview supports drivers to communicate with instruments (GPIB/ NI-488.2 drivers) and DAQ (NI-DAQ drivers).
If it's possible I suggest you to use the last version of Labview (you'd benefit of the new features): the 6.1 (the 7.0 is incoming).
Bye
Nick