General issue with class declaration

Question

Hi all,
Iam very new to OO programming.
can any one tell as how i should call a CLASS
FOR FM , i know we use click pattern and give the required FM name and it would bring up the code in the editor and we have to pass the necessary parameters
but how should i call a class , is there a way to call it or do i need to write the code manually
say when i code like this does that mean it has been typed  or just called like a FM
If its called like FM , let me know how its called
CALL METHOD cl_gui_frontend_services=>file_open_dialog
     EXPORTING
       window_title            = 'Select file for download'
       default_extension       = '.txt'
       initial_directory       =  'C:\'
     CHANGING
       file_table              = li_filetable
       rc                      = lv_return
     EXCEPTIONS
       file_open_dialog_failed = 1
       cntl_error              = 2
       error_no_gui            = 3
       OTHERS                  = 4
Thanks

Answer 1

Hi,
Sorry ... I am in SAP 4.7 and ECC 5.0.
I am not sure whether is available in 4.6C (i am afraid you need to type by yourself).
When you click on Pattern button (SE38), system should display an option for  AABAP Object Patterns (4.7) and ABAP Object Patterns (ECC 5.0).
Then you click on OK button in order to see another selection for OO Statement Pattern (new popup window). In here, you should see Call Method selection and others.
Regards,
Ferry Lianto