JavaScript must be enabled in order to use this site. Please enable JavaScript in your browser and refresh the page. isiisvalid isiisvalid Purpose Check whether an IIS number exists. Synopsis function isiisvalid(numiis:integer):boolean Argument numiis Ordinal number of the IIS Return value true if numiis corresponds to an existing IIS. Related topics resetiis, getiis. Module mmxprs Parent Topic Procedures and functions