Credit Check Processing BSFN B4200420

[coolkl]

Need to pass additional parameter to B4200420 - Credit Check BSFN from business functions calling it from Sales order entry P42101. I find B4200310 - F4211FSEndDoc clearly calls B4200420 - Credit Check Processing internally.
However, Logs indicate also W42101D Confirm Sales Order View Controller (B4210400) calls Credit Check Processing BSFN B4200420. But when I check the c code for B4210400, I don't see the call to B4200420. Any idea where in B4210400 is B4200420 called.

So my query is where in B4210400 is B4200420(Credit Check) called ? When I look at W42101D_ConfirmSalesOrder - B4210400 I see the code as below. But not sure if the logic for SalesOrderApplicationController is accessible ?
idReturnValue = SalesOrderApplicationController(lpBhvrCom,
lpVoid,
&nSalesOrderAction,
(LPVOID)lpDS,
_J("D4210400B"),
lpDS->szSessionKey,
(LPMATH_NUMERIC)NULL,
FALSE);

JDEDEBUG Log:

jdedebuglog: Calling Business function CreditCheckProcessing from W42101D_ConfirmSalesOrder
*** Start dumping data structure for business function CreditCheckProcessing ****

 

[coolkl]

I found : B4210020 - ProcessSalesOrderHeaderFunctions is calling b4200420.