IP Address Conversion using an IBM API

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I am trying to use IBM's API, "inet_addr" to convert an IP address.  The code 
I'm using is,

0161.00            CALL PROCEDURE "inet_addr"
0162.00                USING
0163.00                    by value address of PmIpAddr
0164.00                GIVING
0165.00                    ApiReturn
0166.00            END-CALL.

ApiReturn is pic s9(9) binary.  We know that the IP Address is valid.  The call 
populates the variable by
-989614556.  This is an error.

The answer we're supposed to be getting is 3326352740.  An RPG test program 
gives us that.  In RPG, we define the ApiReturn value as "10U 0" (unsigned 
binary - no decimal places).

I tried changing ApiReturn to pic 9(9) binary.  It still ends up with 
-989614556.

(1)  Does anyone have actual experience doing this?  If so, do I need to be 
doing something different or in addition to what I'm already doing?
(2)  If my pic clause is not correct, what is the correct pic clause for 
"unsigned binary"?
(3)  Any other suggestions?

TIA

Jay Sulzmann
Senior Programmer/Analyst
IBM Certified AS/400 RPG-IV Developer

Hainey Business Systems
8 E. Canal St
Dover, PA 17315
Phone:  (800) 932-3380 x231     Fax:  (717) 292-9474
Web: http://www.hbs-inc.com
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