Codes for how to ''read'' data from serial port?

i have to retrieve digital signals from serial port and saves into database. that is all i have to do. i need to develop this using Visual C++ which have to be in windows platform.. as i'm not sure of the codes used to developed the project. i hope any kind coders could come forward and help me. thank you. ## Deliverables Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. Complete copyrights to all work purchased. ## Platform Windows NT 4.0 ## Deadline information i need to show the first draft of the program by 15th July 2002 and the full developed program by 29th August 2002.