>How can you keep a user from clicking the same command button more than once. They do a double click and spawn the click event twice.
Write the following comment into your user's manual. Something like: "Command buttuns, just like hyperlinks, are meant to be clicked only once. Double-clicking can have unwanted side-effects."
Difference in opinions hath cost many millions of lives: for instance, whether flesh be bread, or bread be flesh; whether whistling be a vice or a virtue; whether it be better to kiss a post, or throw it into the fire... (from Gulliver's Travels)