Sum of string and ' " ' character

Hello !

My simple issue is this one I'd like to create a string called 'commande' containing the expression : Valeur("NomImage"), NomImage being a string variable.

So I have :

commande= "Valeur(""+NomImage+"")"

But of course Igor interpret my double " as an error. So how can I do it ?

best regards !
Gautier