Kun

Hi, I have Ni-USB 6120. And Labview 8.5 Basic. I am new to Labview and have read and made a pulse generating block diagram using the Pulse Generation Tutorial, but I want to do something and cant find it, I want to generate pulses with a push button, i.e., when I push the button, a pulse of a preset frequency and duty cycle should start. Pressing the same button should stop it. In the Pulse Generation Tutorial provided by NI, I dont see any where to put a button. How would I go on doing this? Also I asked on the NI Forums on how to change the line where the output pulse is going, but he just led me to some tutorial which I could not understand. Can anyone help please, I need it done before Monday, thanks. Please Help