Hi akilesh,
in ur coding, instead of this line
CREATE OBJECT zgt_valuehelp
TYPE
zlcl_valuehelp_with_binding.
try with
CREATE OBJECT zgt_valuehelp
EXPORTING
iv_source_type = 'T'.
if u declare the source type as T which means table then this line will work.
zgt_valuehelp->set_selection_table( zgt_bp_role ).
Thanks,
Pandi.