Spool – Output
The output controller – Spool Request Selection Screen can be used in transaction code SP01.
This will give you spool requests and output requests by system.
If you wish to limit a user access to their own individual spool requests you can give them access to SP02.
If you wish to completely control the spool and output functionality of a system you can use the administration transaction SPAD (or additionally transaction SPAT.)
When working with output/messages you can access the objects message status in table NAST.
If you are looking for a simple single table overview of all output/message condition types which have a condition record you can use table NACH. (This will give you the Condition Type+Access Sequence Table+Application+Partner function and a variable key which will show you the key fields for the access sequence table.)
Function Modules for SD Reports and Smartforms
These function modules are great to get the information used to populate Smartforms and reports in SD.
Remember you can access the data with transaction SE37 and use the test/execute icon [F8].
SAP Tips – Convert SAPSCRIPT to SMARTFORMS
There are two ways through which you can convert SAPSCRIPT into SMARTFORMS as follows: Read more 
