There isn't really anything standard in BSP to do this. There are a couple of old threads in the forum from Brian McKellar that discuss why this never happened. However there is a weblog that shows you how to build you own as a Custom BSP Extension.
/people/thomas.jung3/blog/2004/11/01/bsp-value-input-help-popups-version-20-part-1
/people/thomas.jung3/blog/2004/11/01/bsp-value-input-help-popups-version-20-part-2
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