I'm speculating a little bit here but I see that the BTBee is just another HC-05 but in a fancy package. So, rather than be stuck in the dark.....
1. In my Arduino sketch, do I need to run certain commands to set up BTBee Pro and the Bluetooth connection?
2. Do I assume that the BTBee Pro is the serial connection and therefore simply use my serial routines as if I was connected to a PC?
3. I read something about replacing rxtxserial.dll. Is this necessary to getting it all to work?
I have no idea, but I can't see why you need it to prove the bluetooth works.
So far, I can use my Windows hand held terminal to see the BTBee but even after pairing with the default code 1234, I cannot connect to it. I will write an application in C# for the Windows terminal to tell Arduino to control the motor.
The pairing only proves the bluetooth has power and is not a dud. It only needs power to pair it. I don't think it needs to be even connected to the Arduino. I don't know what you are actually using to see the BTBee but at least you can see it. I assume you are not connected by USB cable. I suggest you forget about the motor stuff for the moment, get a standard Windows terminal programme like RealTerm, and use that for the connection. Ensure the baud rates match.
This should be all the code you need
Serial.println("OK then, you first, say something.....");
Serial.println("Go on, type something in the space above and hit Send, or just hit the Enter key");
Serial.println("I heard you say: ");
Serial.write(Serial.read());// note it is Serial.WRITE