// *******************************************************************************************
// Drag.h                                                 CARBONIZED.  USES CARBON EVENT MODEL
// *******************************************************************************************
//
// This program demonstrates drag and drop utilising the Drag Manager.  Support for Undo and
// Redo of drag and drop within the source window is included.
//
// The bulk of the code in the source code file Drag.c is identical to the code in the file
// Text1.c in the demonstration program MonoTextEdit (Chapter 21).
//
// The program utilises the following resources:
//
// •	A 'carb' resource.
//
// •	An 'MBAR' resource, and 'MENU' resources for Apple, File, and Edit menus.
//
// •	A 'WIND' resource (purgeable) (initially visible).
//
// •	'CNTL' resources (purgeable) for the vertical scroll bars in the text editor window and
//		Help dialog, and for the pop-up menu in the Help Dialog.
//
// •	A 'STR#' resource  (purgeable) co