The class message-pane
is used to implement the message decoration on subclasses of titled-object.
A message-pane
with
text
"Message" is created automatically when a titled-object is created with
message
"Message".
message-pane
does not add functionality to title-pane, and it is used only to allow different resources in GTK+ and Motif.
CAPI User Guide and Reference Manual (Windows version) - 3 Aug 2017