To which converter are you referring?
There is a preprocessor called WINDOW1 that is supported in both Visual COBOL for Visual Studio and Visual COBOL for Eclipse that provides compatibility for ACU popup support.
Is this the feature to which you are referring?
Example:
$set preprocess(window1) working-storage section. 78 note-height value 16. 78 note-width value 41. 78 no-of-chars value note-height * note-width. 01 note-window pic x(10). 01 dummy pic x. 01 note-data value all "- wallpaper ". 03 note-char pic x occurs no-of-chars. screen section. 01 input-data highlight. 03 line 4 column 6 value " Accept and Display positions ". 03 line 5 column 6 value " are relative to the top left ". 03 line 6 column 6 value " corner of the window. ". 03 pic x using dummy. 01 note-screen pic x(no-of-chars) using note-data prompt " " reverse-video. procedure division. * Put a blank window on the screen with a border and title display window, line 2, column 38, lines note-height, size note-width, boxed, erase, reverse * Define a reference for this window so that it can be * removed and the previous display restored pop-up area is note-window bottom right title "Press Enter to remove window" * Fill the window with the contents of note-screen display note-screen display input-data accept input-data close window note-window.