How to Filter Data From Native COM 1 Send it to Virtual native COM 2 ?

Hi There

in Weighing system There is many Indicators

i want to use any kind of indicators in one Common Software ABC. 

so i  want to receive Data from Serial port [COM1]  RAW DATA [=000.02=000.02=]

then i want to convert or filter  in correct Format  [Trim,Mirror,reflect etc..] 

then send it to Artificial Port may be like [COM 2] Converted Data [20.000]

So in Common Software ABC i can select COM2 or maybe [Something native virtual port where applications can detect as port]  for filtered input.

i Want to Develop  Application with C#,WPF

1, Serial port Converter

Please Help