simply closing a vi does not remove it from memory.
one way to do that is to load the vi dynamically, run it, and when done close its refernce. That will remove it from memory. Look at the examples that ship with LabView for loading vi's dynamically.
to put an image in a button. Select the buton.
Edit-----customize control you are now in screen to cutomize the vi
Edit--Import picture from file
the right click on the button... import picture
Update
