Need help with format number

[agpaco]

In 2003, I need a way to: if de number don't have €, he put ZAR. But if have
€, he don´t modify. I think the only way is creating a new number format, but
I don't no how.

 

[agpaco]

Thank for your help. I first think to use If, but how can detect the euro
format?