The features described in this topic are obsolete
and should not be used in new IDL code.

PREF_MIGRATE

The following keywords to PREF_MIGRATE became obsolete in IDL version 7.0:

MACRO

If this keyword is set, the migration process migrates only workbench macros. This option is allowed only under Microsoft Windows because it has no meaning to the Motif (UNIX) version of the workbench.

STARTUP

At startup, if IDL determines that the user does not have a user preference file, it runs PREF_MIGRATE with the STARTUP keyword set prior to running the startup file (if any) or prompting the user for input. STARTUP mode differs from a regular call in a few ways:

A dialog is used to explain what is happening and to ask for the user's permission to continue, before moving into the main application.

It runs in a blocking mode so that any changes it makes will be in effect before the startup file (if any) runs and the user is able to enter commands at the IDL prompt.