In SAP most of the people used ALV report to fill their demands.ALV means ABAP List Viewer. This time I am providing some important information on Simple Report. Simple Report: This report provides function modules which is helps to get the desired report without provide much effort.Important function modules are given below: Reuse_ALV_Fieldcatalog_merge Reuse_ALV_grid_Display Reuse_ALV_Events_Get Reuse_ALV_List_Display Reuse_ALV_Commentary_Write Reuse_ALV_Fieldcatalog_merge: Populate a field catalog which is essential to display data in ALV report. Important catalog are given here. 1. Export: I_Program_Name : report id. I_Internal_Tabname : Internal output Table. I_Inclname : Include or the report name where all the dynamic forms are handel. 2.Changing: Ct_fieldcat: an internal table with the types SLIS_T_Fieldcat_ALV which is declare in the type pool SLIS.