Generated Web Service & conversational rpc

I have a natural subprogram, natural rpc server, and a generated web service deployed into tomcat.
In the docs I find that I need to set the parameter EXX-CONV to either OPEN, COMMIT, or BACKOUT. My question is, where do I set that parameter? Also, I can’t find a location in the EntireX Workbench to specify I want to use conversational rpc. I have the following SOAP call currently (what do I add to enable conversational rpc?):





X














Do I get back a conv-id from the first call that needs to be sent on subsequent calls?
Thanks

the parameter is set as an HTTP header value (lower case names only).

http://techcommunity.softwareag.com/ecosystem/documentation/webmethods/wmsuite8_ga/EntireX/xmlWrapper/writeAppsAdv.htm#Using_Conversational_RPC

“Conversations can only be used in connection with sessions”

I set my http parameter to ‘OPEN’ and I specified to ‘mysession’ and made my call from the XML Tester in the workbench. Then what do I specify for the second call of the conversation? I am not ready to either commit or backout yet? I want to make 3 calls, first one open a conversation and update a record, second call update another record, third call either commit or backout.
Thanks, Carl