A handle to the static window of the current
ABL session. Every ABL session has one static window. This window
displays all frames until the CURRENT-WINDOW system handle is set
to the handle of another [dynamic] window or unless a displayed
frame is explicitly parented to another window. Its message area
also displays messages that have no other available display destination.
Use the DEFAULT-WINDOW handle to set or examine the attributes of
this unnamed session window.
Syntax
DEFAULT-WINDOW [ :attribute ]
|
-
attribute
- An attribute of the DEFAULT-WINDOW.
Attributes
The
DEFAULT-WINDOW handle has all the attributes of a window widget.
Notes
- If
you display or view a frame without the IN WINDOW option and without
first explicitly or implicitly setting CURRENT-WINDOW to the handle
of a non-default window, the ABL virtual machine (AVM) displays
the frame in the default window.
- If the CURRENT-WINDOW does not have a message area and you execute
the MESSAGE statement without an explicit or implicit VIEW-AS ALERT-BOX
option, the AVM displays the default window in order to display
the message in its own message area.
- In a character interface, or at the start of a GUI client session,
the ACTIVE-WINDOW, CURRENT-WINDOW, and DEFAULT-WINDOW handles all
return the handle of the static window for the current ABL session.
- You can make the default window the current window by assigning DEFAULT-WINDOW
to CURRENT-WINDOW.
- You can enable or disable the default window by changing the
value of DEFAULT-WINDOW:SENSITIVE (the SENSITIVE attribute).
- You can set the menu bar for the default window by assigning
the handle of a menu bar to DEFAULT-WINDOW:MENUBAR (the MENUBAR
attribute).
- You can make the default window visible or invisible by changing
the value of DEFAULT-WINDOW:VISIBLE (the VISIBLE attribute).
- Because DEFAULT-WINDOW is the initial default parent for ABL frames, you cannot set
DEFAULT-WINDOW to the handle of a .NET form's shadow window. If allowed, this would make
the associated .NET form a possible parent for ABL frames, and ABL cannot parent ABL
frames to .NET forms. A .NET form's shadow window handle is provided by the ProWinHandle property of the Progress.Windows.Form class, which an OpenEdge .NET class designed
for instantiating .NET forms in an ABL session. Therefore, any attempt to set
DEFAULT-WINDOW to a ProWinHandle property value raises a run-time error.
