asdoublevector() xlw (c++ )method

This is actually a question about c++ programming for excel, rather
than programming _in_ excel.
If you feel it's O.T., please feel free to suggest a more appropriate
newsgroup with a reasonable level of activity. I know it's O.T. for
comp.lang.c++

This question refers to the commonly used c++ freeware called xlw
which is a wrapper for excel. I have written c++ code which uses the
AsDoubleVector() method on members of the class XLFOPER.

I want to change my code so that the user can type an integer directly
into the function wizard, and so that the program will interpret that
as a cell containing the integer, from which the AsDoubleVector()
method is called.

In other words, when the user types 1 into the function wizard, the
program will behave as if the asdoublevector() method has been called
on the xlfoper object corresponding to an XL cell containing the
integer 1.

Thanks a lot for your help,

Paul Epstein