Would it happen if you use unmodified API_APIRUN?

>I use modified Ed Rauh API_APIRUN routine from downloads to launch a standalone exe file and wait for completion.
>
>After exe file finished, Alt key stops working in my appl.
>For example, Alt+F does not open file menu.
>
>Normal Alt key behaviour is restored if I manually use Alt+Tab to switch to other application and then back to my application.
>