Normally Windows will not allow two serial communications programs to open the same serial port at the same time however it is possible to use TCP-Com to feed data from a physical RS232 serial port to multiple "Virtual" serial ports so that more than one application program can input data from a single RS232 serial port.
To accomplish the above, configure one instance of TCP-Com to open a physical serial port (COM1) on your PC and act as a TCP/IP server using any port number that you like. Next, open a second instance of TCP-Com (select New from the TCP-Com File menu) and configure the second instance to create a virtual COM port (COM2) and have it connect as a TCP/IP client to the TCP/IP port that the first (server) instance has been configured to use. Finally, open a third instance of TCP-Com and configure it to create another virtual COM port (COM3) and have it also connect as a TCP/IP client to the TCP/IP port that the first (server) instance has been configured to use. After you activate all three instances of TCP-Com, your computer will behave as if it had two additional COM ports COM2 and COM3. At this point, you can run two serial communications programs - one on COM2 and the second on COM3 and both will be able to send and receive data in or out COM1. The arrangement described above will work for as many virtual COM ports that you wish to create so you can actually connect as many separate serial communications programs as you like to the same physical serial port.