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Could you not prototype the routine as

D pTransExtdAMt                                          *
D pTransTotalTx                                           *

D TransExtdAmt
D TransTotalTx


  /free
      executeRoutine(%addr(transExtdAmt):*null);
 /end-free

Thanks,

Mark

Mark D. Walter
Senior Programmer/Analyst
CCX, Inc.
mwalter@xxxxxxxxxx
http://www.ccxinc.com


|---------+----------------------------->
|         |           "DeLong, Eric"    |
|         |           <EDeLong@Sallybeau|
|         |           ty.com>           |
|         |           Sent by:          |
|         |           rpg400-l-bounces@m|
|         |           idrange.com       |
|         |                             |
|         |                             |
|         |           10/09/2003 03:34  |
|         |           PM                |
|         |           Please respond to |
|         |           RPG programming on|
|         |           the AS400 /       |
|         |           iSeries           |
|         |                             |
|---------+----------------------------->
  
>------------------------------------------------------------------------------------------------------------------------------|
  |                                                                             
                                                 |
  |       To:       "'rpg400-l@xxxxxxxxxxxx'" <rpg400-l@xxxxxxxxxxxx>           
                                                 |
  |       cc:                                                                   
                                                 |
  |       Subject:  Help with parameter passing                                 
                                                 |
  
>------------------------------------------------------------------------------------------------------------------------------|




Hi everybody,

We're trying to integrate a vendor supplied service program, written in C,
into our RPGIV applications.  We've attempted to translate the .H include
into RPG prototypes, and have encountered a usage problem.

One of the functions is passing tax_amt and tax_rate as

double *pTransTotalTax,
double *pTransCombRate,

which we've coded as

D  pTransExtdAmt                 8f
D  pTransTotalTx                 8f

So far so good.  Now the problem.  The use of this api states:

"Total tax amount for the transaction. This parameter is used when
processing special (tax-only debit and tax-only credit) transactions. This
parameter is ignored if NULL is passed. Passing 0 results in zero tax being
calculated."

Entended amount is fine, since we will have a calculated value for that
every time we call the api.  But for the call to work properly, we must
send
the other parm as NULL.  How in the he!! am I supposed to do that?  Does C
consider a parm to be null if the address is null?

Can anyone give me some insight?

Thanks in advance....


Eric DeLong
Sally Beauty Company
MIS-Project Manager (BSG)
940-898-7863 or ext. 1863



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