Excel stores and calculates with 15 significant digits of precision.However, you can change the precision of calculations so that Excel uses the displayed value instead of the stored value when it recalculates formulas.Those digits can be in any combination before or after the decimal point.Any digits to the right of the 15th digit will be zeros.If you haven't already, look at the information on getting started with these APIs.

To cancel updating the link and use the previous value obtained from the source worksheet, click Cancel.When you change the precision of the calculations in a workbook by using the displayed (formatted) values, Excel permanently changes stored values in cells from full precision (15 digits) to whatever format, including decimal places, is displayed.If you later choose to calculate with full precision, the original underlying values cannot be restored.You can use Solver when you need to find the optimum value for a particular cell by adjusting the values of several cells or when you want to apply specific limitations to one or more of the values in the calculation.You can use Goal Seek when you know the desired result of a single formula but not the input value the formula needs to determine the result.

There are alot of folks then that are developmentally disabled and I would dare to say that some should be locked up for it.