There is a varity of Software that will send and receive CW. Try Hamscope, MultiPsk, MixW or CWType.
It is not as much fun as a real key or paddle but gets the job done during a contest when there are a lot of operators doing 30+wpm. I dubbed around a bit before I discovered my radio had to be in Digi Mode to transmit so if you are having trouble try that. Later Brad N1NPK