Get the value of a particular field in a segment of an Idoc

Hi All,
I have a requirement where I need to write a report which will fetch the value of a particular field in a segment of an idoc.
I have the idoc number segment and field name as input parameters by which I can fetch Sdata from EDID4 but the confusion is how to find the exact field value from that Sdata. How to Map the SDATA to the segment structure.
Please advice...

Hi,
I have one last doubt that may be you people can help with... The user will be giving the segment name and field name as input. So by following Kesav's code while i can get all the values in the segment structure at runtime please suggest how to display any one field from that structure given that that particular field will come at runtime.
EX: user gives an idoc number 123 (say belonging to Orders basic type)
segment E1EDK01
field BELNR.
So i need to display the value of E1EDK01-BELNR of idoc number 123.
Please suggest how to achieve this....

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>
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McNepp wrote:
endasil wrote:
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Get the value of a particular field in a segment of an Idoc

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