Simple C++ Numerical Input Problem

Hi,

I'm relatively new to C++ and need to read user input numerical values from edit fields into separate variables. I'm sure there is a way to limit users to only be able to enter numerical values, but I can't remember how to do it.

Also, when reading the values out of the edit fields, I get an "unable to convert ansistring to double". The solution to the above question may also solve this, but if not, is there a way around it?

Typical code I'm using is:
number_variable = EditBox->Text;

using Borland 6.


Thanks,
Richard.