Question

I have a fortran (unmanaged code) dll as the calculation engine, and a C# form as the GUI.

Now, the calculation in fortran is long, so in order not to bore the users, I decided to use Asynch command to create a progress bar. The fortran dll would be responsible for putting messages in the progress bar as the calculation proceeds.

Any idea how this can be done?

Answer 1

You have to implement anoter function in Fortran dll that reports progress in numbers. For instance: “GetCalculationProgress” that returns two integers (current iteration and total number of iterations). You call that function periodically in another thread in your C# app and read those values. In Fortran you might have to use global variables to track those.

Besides, Here is a link that explains callback method:

http://xtechnotes.blogspot.com/2008/07/callback-to-c-from-unmanaged-fortran.html