Updating LFA1 table

Hi All,

I add custom fields to LFA1 table, i want to add the values to that fields when i'm creating the new vendor using transaction XK01, these custom fields are on pop-up-screen. in enhancement i call the pop-up screen.I pass the values to that fields in enhancement but they are not updated in the database.

i write code like this.

call screen 0100 starting at 1 20 ending at 10 30.

i want values in pop-up screen are updated in database table.

Please help me.