ConfirmBox Show Method
Displays a ConfirmBox.
R←I ConfirmBox.Show ''
or
R←ConfirmBox.Show I
I is the ConfirmBox instance. R is a string with the button caption of the selection. R is an empty vector if Escape is pressed.
This method waits in APL for the user to make a selection,
See the HTMLDocument Confirm method for easiest use of the ConfirmBox, encapsulating the New and Show methods.