%SIZE

I'm interfacing a RPGLE program with a 3rd party program written in C
but I'm having issues with one of the programs. I'm not sure if it's an
issue with the prototype or if the data that I'm passing in the is
incorrect. VPrtXML is called to perform several different functions
(Open Connection, Close Connection, Query, etc.). I'm able to get the
Open and Close function to work so I've almost eliminated a prototype
error. However, the Query function returns "UNKNOWN ERROR" no matter
what I try. The vendor says that the buffer size parameter
(pResultSize) must match the size of the return buffer (pXmlResult) each
time the program is called or it could cause "UNKNOWN ERROR". Before
each call I set pResultSize = %size(XmlResult);. Am I missing something
here?





D VprtXML PR EXTPROC('VprtXML')

D pConn * value

D pSession *

D pXmlBuffer * value options(*string)

D pXmlResult * value options(*string)

D pResultSize 10I 0 value



* VPrtXML parm definitions

*---------------------------

D pSession s *

D pXmlBuffer s *

D pXmlResult s *

D pResultSize s 10I 0



* Work Fields

*-------------

D Session s 100a

D xmlBuffer s 65500a inz(NULL)

D XmlResult s 65500a inz(NULL)

D NULL C CONST(x'00')



/free

............................

............................

.............................



pXmlResult = %addr(XmlResult);

pResultSize = %size(XmlResult);



VprtXML(pConnectionHandle: pSession: xmlBuffer:

pXmlResult: pResultSize);



Thanks,



Larry




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