Creates a new dialog box.
Widgets should not be packed into the GtkWindow directly, but into the @content_area and @action_area, as described above.
the new dialog as a GtkWidget
ConstructionException GTK+ fails to create the object.
See Implementation
Creates a new dialog box.
Widgets should not be packed into the GtkWindow directly, but into the @content_area and @action_area, as described above.