Serial port communication

Hello everyone,

I've been trying to figure out how to work with the ReadFile( )
function in a serial comm program, and I can't make it do what I want.

I just want a program that receives either a * or a + from a COM port
so that it decides what to send; I tried using a WaitCommEvent but that
didn't help a lot:

DWORD dwRead;
HANDLE hComm;
DWORD dwCommEvent;

char chRead[5];

if (!SetCommMask(hComm, EV_RXCHAR))
      // Error setting communications event mask.
     printf("Event mask error");

for ( ; ; ) {

   if (WaitCommEvent(hComm, &dwCommEvent, NULL)) {

      if (ReadFile(hComm, chRead, 1, &dwRead, NULL))
         // A byte has been read; process it.
         {
       putchar(chRead[0]);
       dwRead=0;}
     else
         // An error occurred in the ReadFile call.
         break;
     }
   else
      // Error in WaitCommEvent.
      break;

}

I am actually getting an output with this, but it's just a line of
garbage (I'm only sending a * character)

Thanks a lot guys,

Dante