Hi sdn frnds

HI
  i am sirisha. i am learning oops in alv my own. some points i am not able understand. can anybody expalin about mentioned below.
1.LCL_EVENT_HANDLER DEFINITION DEFERRED.
2.DATA GR_ALVGRID TYPE REF TO CL_GUI_ALV_GRID .
3.DATA GR_ALVGRID_DET TYPE REF TO CL_GUI_ALV_GRID.
4.DATA GC_CUSTOM_CONTROL_NAME TYPE SCRFNAME VALUE 'CC_ALV'.
5.DATA GC_CUSTOM_CONTROL_NAME_DET TYPE SCRFNAME  
               VALUE 'CC_ALV_DET'.
6.DATA GR_CCONTAINER TYPE REF TO CL_GUI_CUSTOM_CONTAINER .
7. DATA GR_CCONTAINER_DET TYPE REF TO 
                                                   CL_GUI_CUSTOM_CONTAINER.
  help me please.
with regds
Siri.

hi siri
'TYPE REF TO' is used to refer to a class.
for example, i have a class CL_CLASSNAME.
and if i want to create an object for that class, i have to declare the object with reference and then create. for that purpose, first you refer your object to your class -
DATA: objname TYPE REF TO cl_classname.
then you have to create an object -
CREATE OBJECT objname.
then the object is created.
thanks
pavan
**pls mark for helpful answers

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