How to call the RFC from R/3 to SRM, when we use webdynpro abap? (Urgent)

Hello
We use SRM Server 5.5 with classic scenario.
We want to call RFC in R/3 from webdynpro ABAP.
How can we do that?
We are developing the web report using webdynpro abap.
So we need some of R/3 data such like PR(EBAN)and PO(EKKO,EKPO).
When user choose the search parameter, report diplay the Shopping cart, PR and PO data on webdynpro.  So we call the R/3 RFC to display the PR, PO data.
But I tired to call the RFC in R/3, We could not call it.
How to call the RFC from R/3 to SRM, when we use webdynpro abap?
Thank you,
Best Regards,
SH.

Hi
<b>Please look at the following threads as well -></b>
WebDynpro in SRM
BAPI's /RFC's in SRM
BAPI to Change Shopping Cart by RFC
SRM60 and webdynpro
Webdynpro Services Exception
WebDynpro using BAPI has an error
SRM60 and webdynpro...
<b>SAP uses META Function modules in SRM to get data from R/3 back-end.</b>
<u>For getting Purchase requistion data, use the function modules -></u>
META_REQUISITION_CHANGE        Change purchase requisition              
META_REQUISITION_CREATE        Create Requisition                       
META_REQUISITION_DELETE        Delete/close purchase requisition        
META_REQUISITION_GETDETAIL     Display requisition details              
META_REQUISITION_GETITEMS      Display requisition items                
META_REQUISITION_GETRELINFO    Get Releasease Info for requisitions
<u>For getting Purchase order data, use the function modules -></u>
META_PO_CREATE                 Create purchase order                    
META_PO_DELETE                 Delete reservation                       
META_PO_GETDETAIL              Display purchase order details           
META_PO_GETITEMS               Display purchase order items             
META_PO_GETRELINFO             Display purchase order release information
Hope this will definitely help. Do let me know.
Regards
- Atul

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