File open dialogue

Question

Hello,
I was trying to use the File_open_dialogue in the CL_GUI_FRONTEND_SERVICES and used the parameters as follows:
CALL METHOD CL_GUI_FRONTEND_SERVICES=>FILE_OPEN_DIALOG
     EXPORTING
       WINDOW_TITLE            = 'Select Files'
       DEFAULT_EXTENSION       =  '*.txt'
     DEFAULT_FILENAME        =
     FILE_FILTER             =
     WITH_ENCODING           =
     INITIAL_DIRECTORY       =
However, each time I open up the file open dialogue, it always set the default extension to *.rtf, which is not what I want, although *.txt is one of the options listed. How can I change the code to ensure that .txt file is the default while other options will still be available? Thanks a lot!
Regards,
Anyi

Answer 1

Hi anyi,
1. SIMPLE
2. give like this.
3.
<b>DEFAULT_EXTENSION       = 'TXT'</b>
4. Note :
  a) Do not give *
  b) give in CAPITAL CASE
regards,
amit m.