How to upload/update header and item long text to Purchase Tran ME21N?

Hi Sap Gurus,

I need some information over header and item long text updation into ME21n using BDC reocrding.

And that is too with respect to their respective header selection and item selection.

Here, iam passing header data with respect to 'header text' , 'Header Note', 'Pricing Types' , 'Deadlines' (Header selection)etc.., separately,

and

iam passing item text data with respect to 'Item Text', 'Info record PO text' , 'Material PO text' etc..,separately

how i can pass these header and item long text with respect to their selection?

Pls give me the solution asap.

thank in advance.

Message was edited by:

siri