SAP Function /SAPNEA/SMAPI_OPENITEM_GETLIST - Get the open item list customer can come from other smapi

Parameter	Reference	Type	Length	Default	Optional	Text
COMPANYCODE	BAPI3007_1-COMP_CODE	C	4			Company code
CUSTOMER	BAPI3007_1-CUSTOMER	C	10		X	Customer number
DOC_TYPE	BKPF-BLART	C	2		X	Document type
KEYDATE	BAPI3007-KEY_DATE	D	8	SY-DATUM	X	Open Items at Key Date
NOTEDITEMS	BAPI3007-NTDITMS_RQ	C	1	SPACE	X	Noted Items Requested
P_KUNNR	KNA1VV-KUNNR	C	10		X	Customer number
P_PARVW	KNVP-PARVW	C	2		X	Partner function
P_SPART	KNA1VV-SPART	C	2		X	Division
P_VKORG	KNA1VV-VKORG	C	4		X	Sales organization
P_VTWEG	KNA1VV-VTWEG	C	2		X	Distribution channel

Parameter	Reference	Type	Length	Text
RETURN	BAPIRET2	u	548	Return parameter

Parameter	Reference	Length	Optional	Text
DOC_TYPESELECTION	/SAPNEA/BAPIBLART	7	X	range table foe document type
OPENITEMS	/SAPNEA/BAPI3007_2	1197		Transfer structure/Customer/openLine item,append overdue dat

Functionality
This SMAPI can get list all the openitems.
Company code is mantory.
Customer is also mantory for internal FM:BAPI_AR_ACC_GETOPENITEMS.
Now you can use the sales organization, sales distribution, division to
choose the right customer set. This is based on SMAPI:
/SAPNEA/SMAPI_CUSTOMER_GETLIST.
the overdue dates is calculated by openitems-overdue_dates = KEYDATE
- openitems-bline_date - openitems-netterms.