Checks if the site specified by the site ID has a main currency defined.
            Returns null if the main currency is defined, otherwise returns a warning message.
            
Namespace: CMS.EcommerceAssembly: CMS.Ecommerce (in CMS.Ecommerce.dll) Version: 8.0.0.0 (8.0.5239.26125)
Parameters
- siteId
 - Type: 
System Int32
ID of site to check 
Return Value
Type:See Also