use_header_bar

true if the dialog uses a headerbar for action buttons instead of the action-area.

For technical reasons, this property is declared as an integer property, but you should only set it to true or false.

Creating a dialog with headerbar

Builtin `GtkDialog` subclasses such as [[email protected]] set this property according to platform conventions (using the [ [email protected]:gtk-dialogs-use-header] setting).

Here is how you can achieve the same:

```c g_object_get (settings, "gtk-dialogs-use-header", &header, NULL); dialog = g_object_new (GTK_TYPE_DIALOG, header, TRUE, NULL); ```