Gtk.MessageDialog.format_secondary_markup

### Method

# Gtk MessageDialogformat_secondary_markup

#### Declaration [src]

    void
    gtk_message_dialog_format_secondary_markup (
      GtkMessageDialog* message_dialog,
      const char* message_format,
      ...
    )

#### Description [src]

Sets the secondary text of the message dialog.

The `message_format` is assumed to contain Pango markup.

Due to an oversight, this function does not escape special XML characters like `gtk_message_dialog_new_with_markup()` does. Thus, if the arguments may contain special XML characters, you should use `g_markup_printf_escaped()` to escape it.

    char *msg;

    msg = g_markup_printf_escaped (message_format, ...);
    gtk_message_dialog_format_secondary_markup (message_dialog,
                                                "%s", msg);
    g_free (msg);

This method is not directly available to language bindings.

#### Parameters

`message_format` | `const char*`
| Printf()-style string with Pango markup.
| The data is owned by the caller of the function.
| The value is a NUL terminated UTF-8 string.
`...` | ``
| Arguments for `message_format`.