Hi Friends, i am a new guy to c language.. for my project i need to receive the value from com port throeugh rs232 cable from microp.. after recerive i need to send back again.. so if anybody sourcecode for this please pass to em.. or you have any function receivebyte functiion(receive byte from microp) and sendbyte function (to microp)...please forward me. i can use that function then i can communicate .. i am really expecting your help in this.. waiting for your valuable reply... with regards, karhti..