This function allows you to get a list of available adtool categories. To use this function, you must make a SOAP call with the following parameters:
<?xml version="1.0" encoding="ISO-8859-1"?>
<SOAP-ENV:Envelope SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/"
xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/"
xmlns:tns="urn:natsapiadmin_wsdl">
<SOAP-ENV:Body>
<tns:adtool_categories xmlns:tns="urn:natsapiadmin_wsdl">
</tns:adtool_categories>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>