Monitor COMport and write pictures

[Vladimir]

Hello,
I am quite new to MASM programming but have some experience in programming asm dos,c#,vb etc.
Need to write app to monitor com port and when receive data, like P 15, to show picture 15 (which is located on hdd) on screen or for example S 20, to play sound file (which is located on hdd) to sound card etc.
For comport monitor, I think that I will use WINION lib or any other suggestion?
For displaying pictures, must be 800x600 65556 colors I will probably use PNGlib or any suggestion?

Best regards,
Vladimir