class can be very easy to use but the documentation does not make it entirely
clear how easy it can be. To use it in it's simplest use, it will show progress
in terms of percent and the default step increment (10) will increment (step)
the progress by 10% at at time. Simply call CProgressCtrl::StepIt
after each 10% of progress has completed.
return value is the previous position so you can use something like "if
(StepIt() >= 100)"
to determine if the progress has gone beyond the end, which should not occur. To
determine the end normally, we would use the same method used to determine