Need to add additional fields to standard transaction LECI in Material Management

[Former Member]

Hi SAP Gurus,

We have a requirement to add additional fields to LECI transaction at the bottom of the standard screen. I have found a BADI BADI_CHECK_IN_01 but i am not understanding on how to call the custom module pool program and screen in this Badi. Can anyone tell me how to call the z custom module pool program through this badi.

I could see subscreen tab in definition but when i create implmentaion the sub screen tab is disappeared. Can any give me a sample code or guide me on how to call a custom module pool sub screen type in this Badi,

Thanks

Satish