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HIDE statement
Makes a widget invisible (sets its VISIBLE attribute to FALSE), or clears the message area for a window, or hides all widgets and clears messages in a window.
Note:
Syntax 
 
HIDE [ STREAM stream | STREAM-HANDLE handle ]
  [ widget-phrase | MESSAGE | ALL ]
  [ NO-PAUSE ]
  [ IN WINDOW window ]
STREAM stream
Specifies the name of a stream. If you do not name a stream, the AVM uses the unnamed stream.
STREAM-HANDLE handle
Specifies the handle to a stream. If handle it is not a valid handle to a stream, the AVM generates a run-time error. Note that stream handles are not valid for the unnamed streams. See the chapter on alternate I/O sources in OpenEdge Development: Programming Interfaces for more information on streams and stream handles.
widget-phrase
The widget you want to hide. You can hide windows, frames, and field-level widgets. You cannot hide menus. If you do not use this option or the MESSAGE or ALL options, HIDE hides the default frame for the block that contains the HIDE statement.
MESSAGE
Hides all messages displayed in the message area for the specified window. If you use the PUT SCREEN statement to display data in the message area, the HIDE MESSAGE statement does not necessarily hide that data.
ALL
Hides all widgets in the window and clears the message area for the window.
NO-PAUSE
Does not pause before hiding. Ordinarily, if data has been displayed, but there have been no data entry operations or pauses, the AVM prompts you to press SPACEBAR to continue before hiding the widget.
IN WINDOW window
Specifies which window the HIDE statement acts on. The value window must evaluate to the handle of a window. If you do not use the IN WINDOW option, the current window is assumed.
Example 
The following example uses the HIDE statement to hide selected frames. The DISPLAY statements re-display the frames when the loop iterates.
 
DEFINE VARIABLE selection AS INTEGER NO-UNDO FORMAT "9".
 
FORM
  "Please Make A Selection:" SKIP(2)
  "    1. Hide Frame A.    " SKIP
  "    2. Hide Frame B.    " SKIP
  "    3. Hide All.        " SKIP
  "    4. Hide This Frame  " SKIP
  "    5. Exit             " SKIP(2)
  WITH FRAME X NO-LABELS.
 
REPEAT:
  VIEW FRAME x.
  DISPLAY "This is frame A."
    WITH FRAME a ROW 1 COLUMN 60.
  DISPLAY "This is frame B."
    WITH FRAME b ROW 16 COLUMN 10 4 DOWN.
  MESSAGE "Make your selection!".
  UPDATE "Selection: " selection VALIDATE(0 < selection AND selection < 7,
    "Invalid selection") AUTO-RETURN
    WITH FRAME x.
 
       IF selection = 1 THEN HIDE FRAME a.
  ELSE IF selection = 2 THEN HIDE FRAME b.
  ELSE IF selection = 3 THEN HIDE ALL.
  ELSE IF selection = 4 THEN HIDE FRAME x.
  ELSE IF selection = 5 THEN LEAVE.
  PAUSE.
END.
Notes 
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The frame associated with that first frame activity is not hidden because it would be redisplayed immediately. This improves display time. When a block ends, the AVM removes the hide tags from all the frames scoped to that block or to nested blocks.
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See also 
CLEAR statement, VIEW statement, Widget phrase, Stream object handle

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