Review Your Application for Possible Drop Zones

Identify the types of data your application might accept through a drag-and-drop transaction. If, for example, you are writing a bitmap editor, you want to support the drop of files. Once you have identified the data types you will allow to be dropped on your application, determine the widget or widgets that should be drop zones. For the bitmap editor example, you may decide the only place a file should be dropped on the application is the bitmap editing area. In this case, register the widget representing this area using DtDndDropRegister() and provide the appropriate callbacks.

Because it is easiest to handle the drop of file names, start by implementing them. Once you have mastered this technique, you will find it easier to move on to implementing the drop of text and buffers.