Pass values From the Screen fields into the Field exit Function Module

Hai All,

I have created a Field Exit For MIGO transaction for the Delivery note field,I can able to pass the Screen value of the Delivery note field using the import parameter Input in the Function Module Field Exit,now along with the Delivery note field i should also get the posting date BUDAT, Vendor LIFNR fields along with the delivery note field,how can i pass those datas into the Field exit function module.

In the Debugging Mode if i check it before the Field exit Function module the bldat, lifnr field values are there, if it enters into the FM field exit the values get cleared and similarly if it is out of the FM filed exit, the values are there as before,

so how can i get the Values,

with regards,

Sathish