combobox1.item.clear;
adoquery1.close;
adoquery1.sql.clear;
adoquery1.sql.add('select * from master.dbo.sysdatabase');
adoquery1.open;
adoquery1.first;
while not adoquery1.eof do
begin
combobox1.item.add(adoquery1.fieldbyname('name').asstring);
adoquery1.next;
end;