Question

I have following statements in Oracle query window in VS2010,
It does not show output!, event the statement dbms_output.put_line(‘Hello’) shows nothing;
How do I enable the output ?

 set serveroutput on;
    clear;
    declare c sys_refcursor;
      r pkgPriceWorx.recPriceListCustomers;
      comno varchar2(3);
      cpls number;
      o varchar(3000);
    disc number;
    begin
    --select * from ftPriceListCutomers('020','221');
     comno:='020';
    cpls:=221;
       dbms_output.put_line('helllo');
      --c:=pkgPriceWorx.ftPriceListCustomers(comno,cpls);
      --loop
        -- fetch c into r;
         --dbms_output.put_line(r.cuno);
         dbms_output.put_line('helllo');
         --exit when c%notfound;
      --end loop;
      disc:=23.2;
      pkgPriceWorx.prUpdateOrInsertDiscount('020','221','000051','1AA00','20-mar-1999',disc,o );

    end

Answer 1

The set serveroutput on; and clear; are sqlplus commands, not plsql so they will probably won’t work in other environments.
I don’t know if you can write messages to some standard output this way, but if you want to debug your plsql from vs2010, you can use this tutorial:
http://www.oracle.com/webfolder/technetwork/tutorials/obe/db/dotnet/debugging/Debugging.htm

or use UTL_FILE for logging to a file.