The Hourglass method enables an “hourglass-shaped” cursor for all ENVI dialogs. The hourglass remains in place until the function attempts to process the next event, then the previous cursor is reinstated. If an application starts a time-intensive calculation inside an event-handling routine, use the hourglass cursor to indicate that the system is not currently responding to events.
Syntax
ENVIUI.Hourglass
Arguments
None
Keywords
ERROR
Set this keyword to a named variable that will contain any error message issued during execution of this routine. If no error occurs, the ERROR variable will be set to a null string (''). If an error occurs and the routine is a function, then the function result will be undefined.
When this keyword is not set and an error occurs, ENVI returns to the caller and execution halts. In this case, the error message is contained within !ERROR_STATE and can be caught using IDL's CATCH routine. See IDL Help for more information on !ERROR_STATE and CATCH.
See Manage Errors for more information on error handling in ENVI programming.
Version History
API Version
4.2
See Also
ENVIUI