Fill table with names of files in a folder

From within my native Visual COBOL code, I want to specify the name of a folder (e.g., "c:\surveys\finance\2018") and then populate a working storage table with as many as 500 names of *.xlsx files in that folder.   All the filenames will be 13 characters in length: nnnnnnnn.xlsx

01  SURVEY-FILE-TABLE.

      05  SURVEY-FILE   PIC X(13) OCCURS 500.

I've been studying available documentation on CBL_DIR_SCAN_START, CBL_DIR_SCAN_READ, and CBL_DIR_SCAN_END -- but it's all Greek to me.  Are those even the routines that I will need?   And are there any examples out there that actually show getting a list of filenames in a given folder? 

  • The following is an example that will scan a specified folder for all files with an extension of .txt and then display them to the user.

     

           id division.
           program-id. dirscan.
           working-storage section.
           01 any-key pic x.
           01 f-entry.         
              03 f-attribute        pic x(4) comp-5.
              03 f-date-stamp.  
                 05 f-year          pic x(4) comp-5.
                 05 f-month         pic x(2) comp-5.
                 05 f-day           pic x(2) comp-5.
                 05 f-hour          pic x(2) comp-5.
                 05 f-minute        pic x(2) comp-5.
                 05 f-second        pic x(2) comp-5.
                 05 f-millisec      pic x(2) comp-5.
                 05 f-dst           pic x    comp-5.
                 05 f-size          pic x(8) comp-5.
                 05 f-name.     
                    07 f-max-len    pic x(2) comp-5 value 256.
                    07 f-entry-name pic x(256).
           
           01 scan-pattern.
               05 pattern-len       pic x(2) comp-5  value 0.
               05 pattern-text      pic x(256)       value spaces.
           01 scan-attrib           pic x(4) comp-5  value 1.      
           01 scan-flags            pic x(4) comp-5  value 2.
           01 scan-status           pic x(2) comp-5  value 0.
           01 scan-handle           pointer.
           01 my-field              pic x(256)  value "c:\temp\*".
           01 char-count            pic 9(5) value 0.
           procedure division.
               
               move z"c:\temp\*.txt" to pattern-text
               move 0 to pattern-len
               move 1 to scan-attrib
               move 2 to scan-flags
               
               call "CBL_DIR_SCAN_START" 
                  using by reference scan-handle,
                        by reference scan-pattern,
                        by value scan-attrib,
                        by value scan-flags,
                  returning scan-status
               end-call
               
               perform until exit           
                  move spaces to f-entry-name
                  call "CBL_DIR_SCAN_READ"
                     using  by reference scan-handle
                                         f-entry
                     returning scan-status
                  end-call
                  if scan-status = 0
                     perform varying char-count from length of f-entry-name by -1 until char-count < 1
                        if f-entry-name(char-count:1) = "\"
    				       add 1 to char-count
                           exit perform
                        end-if
                     end-perform
                     display f-entry-name(char-count:) 
                  else
                     call "CBL_DIR_SCAN_END" using scan-handle
                     exit perform
                  end-if
               end-perform.
               accept any-key
               goback.