Messages

In the APIs you have a function called ReadSignature. This returns a string representation of the devices numeric Id.
It would be good if this could be converted to your device Id enumeration such that it could be passed in to the connect function.

The FMExceptions just provide an error string which in most cases isn't appropriate for displaying to a user. My code currently checks for substrings in this and displays a more appropriate user error message but this is less than optimal and will break if you ever change the error string.

It would be good if you could provide error codes in addition to the strings.