ProgressCallbackFunction
(function) The name of a function that will be called whenever progress is made in the install operation. (You can use this callback function to display the progress of the install operation in your own custom way.)
Note: If ProgressCallbackFunction is set to nil, then the progress information will be sent to the built-in status dialog, assuming it is currently visible. (You can show or hide the status dialog with a StatusDlg.Show or StatusDlg.Hide action.)
The callback function must be able to receive the following parameters: