sap script -- TO VIEW FAX OUTPUT

hi all,

i am doing sapscript for purchase order form , i am using a zform and MEDRUCK print program , i have completed the two layouts totally , one for printout and another for FAX .

the thing is that ,once i save the purchase order after giving output type in header-->messages .

i can see the output(print preview) for Zform for o/p type PRINTOUT in the transaction code SPO1 .

where as for o/p type FAX ,where is the o/p's displayed is there any tcode for viewing the o/p's, how to view the output .

thanks

ravi.s