![]() ![]() If you use a COM name, you must obtain the COM port number from the COM port database. To ensure compatibility with most applications that access COM ports, you should assign a symbolic link name that uses the standard naming convention "COM ", where is the COM port number (for example, COM1). You operate the COM port by using the 16550 UART-compatible interface that is defined in Ntddser.h. ![]() The GUID for this class is GUID_DEVINTERFACE_COMPORT, which is defined in Ntddser.h. You access the COM port through an instance of the COM port device interface class. ![]() Starting with Windows 2000, a COM port is a type of serial port that complies with the following additional requirements: ![]()
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