44 Passing parameters to Smart Forms in SAP
To pass parameters to a Smart Form, you define variables, structures, or tables in the Form Interface, and then supply that data when calling the form dynamically in your ABAP print program.
Step 1: Define Parameters in the Smart Form Interface
Open your form in transaction SMARTFORMS and expand the Global Settings folder in the left navigation tree. Click on Form Interface.
IMPORT Tab: Define single variables or structures passed into the form (e.g., IM_VBAK TYPE VBAK). Check the Optional checkbox if the driver program doesn't always need to pass it.
EXPORT Tab: Define parameters returned out of the form back to the driver program (rarely used, but helpful for returning page counts or spool data).
TABLES Tab: Define internal tables passed into the form (e.g., IT_VBAP LIKE VBAP).
EXCEPTIONS Tab: Standard exceptions are pre-defined here. Leave them as-is to handle runtime formatting or transmission errors safely
Step 2: Set up Global Definitions (Optional)
If you need to manipulate the passed parameters or declare internal helper variables inside the form layout, use Global Definitions (located right below the Form Interface):
Global Data: Declare variables that can be modified by Program Lines inside the form layout.
Initialization: Write ABAP logic here to calculate values immediately when the form loads, using your IMPORT parameters as inputs and Global Data variables as outputs
Step 3: Pass Data from the ABAP Driver Program
In your driver program, you must call the Smart Form dynamically. Because SAP generates a unique Function Module name for the form in each environment (Dev, QA, Prod), you must first resolve the exact function module name using SSF_FUNCTION_MODULE_NAME.