GtkSharp/gtk/FileChooserDialog.custom

		[DllImport("libgtk-win32-2.0-0.dll")]
		static extern IntPtr gtk_file_chooser_dialog_new(string title, IntPtr parent, int action, IntPtr nil);

		public FileChooserDialog (string title, Window parent, FileChooserAction action)
		{
			Raw = gtk_file_chooser_dialog_new (title, parent == null ? IntPtr.Zero : parent.Handle, (int)action, IntPtr.Zero);
		}
		
		[DllImport("libgtk-win32-2.0-0.dll")]
		static extern IntPtr gtk_file_chooser_dialog_new_with_backend(string title, IntPtr parent, int action, string backend, IntPtr nil);
		
		public FileChooserDialog (string title, Window parent, FileChooserAction action, string backend)
		{
			Raw = gtk_file_chooser_dialog_new_with_backend (title, parent == null ? IntPtr.Zero : parent.Handle, (int)action, backend, IntPtr.Zero);
		}