Serial Communication (WriteFile)

[fulltime]

Hi all,

I require some guidance on Serial communication.

Currently, I have an array of data to send which are stored as

unsigned short int sendData[10];

so when I call writeFile, i pass the pointer to the start of sendData
WriteFile(hComm, sendData, dwToWrite, &dwWritten, &osWrite)

My question is What should I specify for the bytes to write field (dwToWrite)?

- Should I specify 20 OR
- Should I specify 2 and then keep incrementing the pointer to the next 2 bytes b4 i call WriteFile,

eg. WriteFile(hComm, sendData[1], 2, &dwWritten, &osWrite)

The reason why I am asking this question is I have another application file to READ in the data sent out (by the above codes), I cant seem to read in >1 byte of data... it only fills my receiver buffer with the 1st byte of data.

Thank you
FT