FORM alvdata.
CLEAR gs_layout.
gs_layout-colwidth_optimize = 'X'.
gs_layout-box_fieldname = 'CHE'.
gs_layout-zebra = 'X'.
REFRESH gt_fields.
CLEAR gs_fields.
GS_FIELDS-FIELDNAME = 'CUSTOMERINV'.
GS_FIELDS-SELTEXT_L = '客户发票号'.GS_FIELDS-EDIT = 'x'.
GS_FIELDS-OUTPUTLEN = 12.
append GS_FIELDS to GT_FIELDS.
clear GS_FIELDS.