Creates a new #GtkAppChooserDialog for the provided content type, to allow the user to select an application for it.
a #GtkWindow, or %NULL
flags for this dialog
a content type string
a newly created #GtkAppChooserDialog
ConstructionException GTK+ fails to create the object.
3.0
See Implementation
Creates a new #GtkAppChooserDialog for the provided content type, to allow the user to select an application for it.