Adding help comments when Creating a function

Hi All,

I am creating a function, which I want available for users to select within the user defines functions of excel.

I can create the function, and get it to work. However - I cant seem to add comments to each of the variables that I want the user to select when using the Function.

eg: a Sum if function: Tells you "Range: is the range of cells you want evaluated" when you click on the range field.

Is there a way I can add such comments to a function I am creating?

Thanks