Hi smarter,

 

If Inherit INamingContainer interface, when we set an ID for the child controls, it's UniqueID and ClientID will automatically add this.UniqueID and Separator as Prefix.

 

About separator, please refer to http://technet.microsoft.com/en-ca/sysinternals/system.web.ui.control.idseparator(VS.80).aspx

 

Regards,

 

ken