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No idea what should be the specific reason. Are you sure to open an existing COM port that is displayed in the device manager under serial ports?not working!!
Code C - [expand] 1 2 3 4 5 6 7 8 hPort = CreateFile (lpszPortName, // Pointer to the name of the port GENERIC_READ | GENERIC_WRITE, // Access (read-write) mode 0, // Share mode NULL, // Pointer to the security attribute OPEN_EXISTING,// How to open the serial port 0, // Port attributes NULL); // Handle to port with attribute to copy
You said it. Sorry, I didn't read your post thoroughly.I meant i can not open the URL