Shows a message box of the type @a type with @a text.
On Unix-like systems a GTK message dialog box is shown, on Win32 systems a native Windows
message dialog box is shown.
@param type A @c GtkMessageType, e.g. @c GTK_MESSAGE_INFO, @c GTK_MESSAGE_WARNING,
@c GTK_MESSAGE_QUESTION, @c GTK_MESSAGE_ERROR.
@param text Printf()-style format string.
@param ... Arguments for the @a text format string.
Shows a message box of the type @a type with @a text. On Unix-like systems a GTK message dialog box is shown, on Win32 systems a native Windows message dialog box is shown.
@param type A @c GtkMessageType, e.g. @c GTK_MESSAGE_INFO, @c GTK_MESSAGE_WARNING, @c GTK_MESSAGE_QUESTION, @c GTK_MESSAGE_ERROR. @param text Printf()-style format string. @param ... Arguments for the @a text format string.