I've updated the open source C# Programmable Calculator. Version 2.0.0.7 is now available for download on this website.

For a long time now I've noticed that I sometimes got a mysterious message about a "windows station" when I shut down Windows while C# Programmable Calculator was running. This issue may have been caused by the WndProc code in previous versions. There's code in the MainForm's WndProc method that ensures that calculator buttons don't retain focus when they're pressed.

If you've had that problem in the past, please download the latest version. If you're still having the problem please let me know.