Call external URL from ABAP userexit, capture data and return it to SAP?

My apologies if this question has been asked before, but I've searched for a few hours today and haven't found anything directly related to my question. Thank you in advance for any help you may be able to provide!
I would like to be able to make a call from an SAP userexit during Sales Order Entry in the VA01 transaction in the SD module to an external website, allow the user to capture some data in the external site and then pass that data back into the userexit where I can use it to populate internal tables, etc.
I'm completely unfamiliar with Web Dynpro programming, but this seems like a good place to start my search for a solution.
Does this sound like a problem that can be solved with Web Dynpro and what documentation or code examples should I reference to go about building such a solution.
I should also note that I'm hoping to build a solution that could be called from any userexit in R/3, SAP ERP, SAP CRM, etc. and would obviously need to learn about what dependencies to consider (ex: SAP GUI version, SAP product release number, Web AS release, etc.).
Eric

Thank you for the response. Let me provide some additional information.
The external application will be a Hosted Web page. It is not an SAP system.
The external application will be a web page served by a separate system outside of the company domain(shouldn't matter what the technology is I would think - but the web page will be hosted by a different company than the one calling the URL) that would appear as a web page in which the user will enter data, logic will be performed on that data and then some or all of the data would need to be passed back to the calling point in SAP.
For practical discussions it doesn't matter to me if the call in ABAP occurs in an SD userexit, in a custom report, in an HR screen or in a CRM business partner screen. There will be many places where this external application may be called from and I'm just trying to figure out how to call an external HTTPS URL and return data from that web page to the calling point in ABAP.
I hope that clarifies my question.
Thanks!
Eric

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Edited by: Murali Krishna Kakarla on Jan 26, 2008 7:09 PM
Edited by: Murali Krishna Kakarla on Jan 26, 2008 7:11 PM

Olivier CHRETIEN wrote:>
> Hi Terry,
>
> So these function modules must use the SAPHTTPA RFC destination which uses the exe saphttp.exe ?
>
> How much abap code lines do you have for a web service call ?
> Do you have to code the call specifically for each different web service ?
> Are you able to use the WSDL ?
>
> Nice job if you have coded your own private SOAP runtime !
>
> But I don't think this is an easy solution for everybody...
>
> Regards,
>
> Olivier
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Terry
Edited by: Terry West on Feb 4, 2008 3:08 PM

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Hi,
Someone may help me? I need to call the function module SXPG _ CALL _ SYSTEM from ABAP program for to encrypt a file.
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Maria C

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commandname =
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COMMANDNAME = commandname
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STATUS = status
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EXEC_PROTOCOL = log
EXCEPTIONS
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SECURITY_RISK = 4
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http://help.sap.com/saphelp_40b/helpdata/en/fa/0971ee543b11d1898e0000e8322d00/content.htm
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Meaning
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INTERFACE
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1) SAP server on AIX OS
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2) Would a RFC be required to be made between ABAP and the windows server where external appls is hosted
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PN

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Error while calling java program from ABAP

Hi Experts,
We are trying for RFC inbound scenario.
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/people/gregor.wolf3/blog/2004/08/26/setup-and-test-sap-java-connector-outbound-connection
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Thanks
Prince

Pabi,
Using the RFC connection,we can establish a link between Java and SAP.
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Sree

Call external URL from ABAP userexit, capture data and return it to SAP?

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