The pages on this site contain documentation for very old MS-DOS software,
purely for historical purposes.
If you're looking for up-to-date documentation, particularly for programming,
you should not rely on the information found here, as it will be woefully
out of date.
Key already in use
You used a number for an accelerator key that is already
in use. For example, QBX uses Alt+F1 to display the
previous help screen.
Try typing a number between 2 and 10 in the box after the
statement, "Accelerator Key: Alt+F".