9 Callbacks

This chapter describes the use of callbacks in Image Export. Callbacks allow the developer to intervene at critical points in the export process

Read more about the callback procedure and the EXOpenExport function call in EXOpenExport. Each heading in this chapter is a possible value for the dwCommandOrInfoId parameter passed to the developer's callback.

The new SCCOPT_EX_CALLBACKS option allows developers to enable or disable some or all of these callbacks. See the Options documentation for details.

This section describes callbacks set in EXOpenExport. A second callback function, DASetStartCallback, can provide information about the progress of a file conversion. For more details, see Data Access Common Functions.

This chapter describes the following callbacks: