Follow the instructions in the post by Krishna.
In the transmitter side from the PC, its not necessary to use a controller. Just use any softwares like hyperterminal or putty and open a serial port with baud rate 1200. That is the maximum baud rate at which the rf module can work. You need a serial to ttl converter to interface the serial port with the DataIn pin of the rf module.
Now just send your data to the port and it will get transmitted.