Starting with version 8.1a4, AlphaX offers two ways of displaying a progress indicator when a lengthy operation is being processed:

The rotating indicator is controlled by the new busy property defined with the [setWinInfo] and [getWinInfo] commands. Here are the basic instructions to show or hide this indicator respectively:
setWinInfo -w $w busy 1
setWinInfo -w $w busy 0
where $w is the name of the current window.
To query the state of the indicator (visible or not) use [getWinInfo]
getWinInfo -w $w arr
where $w is the name of the current window and arr is the name of an array. The state is stored in $arr(busy).
The progress bar is controlled by the [progressBar] command which is explained in ProgressBarCommand