Hi I want to enter a minimum value and a maximum value as the input. Ex:3-55 Then I want an output as regular expresion like ([3-9]|[1-4][0-9]|5[0-5]) Thanks

I just wanted to try if there is a way to do that. But you are right. In my case I just can't change the classes at all. It seems that I will have to write a small application to use the other version. Thanks again.

Thanks for your help Heath.

I cast my vote for exceptions, too. A callee can pass far more data about any errors that occur to its caller in a polymorphic way that would be difficult - if not stupid - to do with out params. -----BEGIN GEEK CODE BLOCK----- Version: 3.21 GCS/G/MU d- s: a- C++++ UL@ P++(+++) L+(--) E--- W+++ N++ o+ K? w++++ O- M(+) V? PS-- PE Y++ PGP++ t++@ 5 X+++ R+@ tv+ b(-)>b++ DI++++ D+ G e++>+++ h---* r+++ y+++ -----END GEEK CODE BLOCK-----