Avoiding Backward Compatibility Issues

Avoiding Backward Compatibility Issues

Although RSI strives to maintain backward compatibility with previous versions, some enhancements can require changes to your code. In IDL 6.1, several event structures have been enhanced with new fields. If you have a SAVE file accessing instances of these structures created in a previous release, use the RELAXED_STRUCTURE_ASSIGNMENT keyword to RESTORE to avoid errors when restoring the SAVE file.

Specifically, the event structure fields have changed as follows:

QUERY_TIFF info structure - see New QUERY_TIFF Info Structure Fields

WIDGET_CONTEXT event structure - The WIDGET_CONTEXT event structure associated with base, list, property sheet, table, text and tree widgets has been updated with new ROW and COL fields.

WIDGET_PROPSHEET_SELECT event structure - The WIDGET_PROPSHEET_SELECT event structure has a new NSELECTED field so support multiple property selection in a property sheet.