I don't know this calculator, but perhaps this is equivalent to the payment() function in VFP. Try it with some sample data.
>Does someone knows the financial function that returns the
>same value when pressing PMT button on an HP 12C.
>
>I Need to implement this function in a VFP app.
>
>Thanks in advance.
>
>Peter
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)