Custom message box if import is canceled.

[Dave]

I have a macro that uses the TransferText action to automate the
import of a text file. It takes a while to run, and the users know if
the ESC key or CRTL+BREAK are pressed, it will cancel the import. My
macro displays a message box that says the import was successful after
the TransferText action, but if the import is canceled, it still
appears. How can I create a condition to check to display one message
if successful and another if canceled.