left-justify character fields

Hi,
In DDS for display, we can right-justify a character field by using the
CHECK(RB) keyword
ie. a input of  'ABCD   '  would give us '   ABCD'.

Q. Is there a CHECK(LB) for left-justify? 
if not, I would appreciate any suggestions on how to get the effect as
simple as possible, please.. 
Thanks.
KK Liu.

ps. sample code... 
QDDSSRC/ TSTDSP
*************** Beginning of data *************************************
     A                                      DSPSIZ(24 80 *DS3)         
     A          R DSPMSG                                               
     A                                      CF12(12 'F12 pressed')     
     A                                  5 10'OBJECT :'                 
     A            OBJ           10   B  5 25                           
     A            MSG           20   O 20 25                           
     A                                 23 28'F12=Cancel'               
****************** End of data ****************************************


QCLSRC/ TSTDSPC
*************** Beginning of data *************************************
             PGM                                                       
             DCLF       FILE(TSTDSP)                                   
 START:                                                                
             SNDRCVF    RCDFMT(DSPMSG)                                 
             IF         COND(&IN12 = '1') THEN(GOTO END)               
             CHKOBJ     OBJ(QSYS/&OBJ) OBJTYPE(*LIB)                   
             MONMSG     MSGID(CPF9810) EXEC(GOTO ERR)                  
             MONMSG     MSGID(CPF9801 CPF9815) EXEC(GOTO ERR)          
             CHGVAR     VAR(&MSG) VALUE('Library exists')              
             GOTO START                                                
 ERR:        CHGVAR     VAR(&MSG) VALUE('No such Library')             
             GOTO START                                                
 END:        ENDPGM                                                    
****************** End of data ****************************************

                                                                        
Then, CALL TSTDSPC and enter '   ABC  ' at the screen.
Program bombs with CPF error because of the spaces in front....
Monitoring for error is not the solution!
 
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