First step, check what is the interface used by your RFID reader.
Usually - serial (RS232) yan. In some cases keyboard wedge interface.
Once you know the interface, you use the appropriate communication method.
1. Kung RS232 - you use MSCOMM
2. Kung keyboard wedge - you assume data is coming from the keyboard
In your form one, you use the appropriate method to check if data from the RFID reader
has arrived. Once detected you can load form2 and do what needs to be done.