need help on reading serial port using Readfile()

See more:

C++

i was trying to read a serial port data by using windows api but somehow i could not able to read the serial port properly.. would anyone kindly please help. thanks

this is my code for the reading of the serial port

//***************Read Operation******************//
buffRead = 0;
dwBytesRead = 0;
int nread =20;

if (!ReadFile(hSerial, buffRead, nread, &dwBytesRead, NULL))
{
printf("error reading from input buffer \n");
}
printf("Data read from read buffer is \n %s \n",buffRead);

thanks

kevin