Thanks for the reply, but the thread in which you point to only deals with displaying scientific notation and not the entering of this information when in edit mode within the cell.

Ok strictly speaking it did address the point, but a "There's no built-in way to edit a number in scientific notation" is not really helpfull at all especially given that these forums are supposed to help users of your controls and guide them in the best direction to accomplish what they need.

In any case thanks again for your suggestion i will give that a try.

The thread linked here does address that point. Here's a quote:

"Format only applies to cells that are not in edit mode. There's no built-in way to edit a number in scientific notation."

 In other words, there is no scientific notation editor. You might be able to use a mask to allow scientific notation input by a user. Or you might be able to use a DataFilter to examine freeform text entered by the user and convert it to a value from scientific notation. The DataFilter approach is probably the best way to go, since I think methods like double.Parse will accept strings in scientific notation - although I could be wrong.