you would need to hand code an if statement around the add to cart button to only show it if the column was not equal to 0:
<?php if($row_RecordsetName['QTYColumn'] != 0) { ?>
add too cart button code here
<?php } ?>
Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.
These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.