problems with portwrite functions

i need to write a 3 byte protocol to it with the first byte containing 255 the second 1 and the third 127. but in my port write function it gives me an error function does not take 3 parameters
my code so far is

/************************************************** *********************

PortWrite (BYTE Byte)

************************************************** *********************/
void PortWrite (BYTE Byte)
{
DWORD dwError,
dwNumBytesWritten;

if (!WriteFile (hPort, // Port handle
&Byte, // Pointer to the data to write
1, // Number of bytes to write
&dwNumBytesWritten, // Pointer to the number of bytes
// written
NULL)) // Must be NULL for Windows CE
{
// WriteFile failed. Report error.
dwError = GetLastError ();
}
}

how can i write this three byte protocol to the serial port?? iam using a windows OS and using embedded C++
hope u can help thanx

no i didnt ignore your suggestions i just couldnt get them to work!
could i email u my code so you could have a look at it??

> could i email u my code so you could have a look at it??
No.

Code:

---

unsigned char buff[] = { 255, 1, 127 };
if (!WriteFile (hPort,              // Port handle
                buff,              // Pointer to the data to write
                3,                  // Number of bytes to write
                &dwNumBytesWritten, // Pointer to the number of bytes written
                NULL))              // Must be NULL for Windows CE
{
    // WriteFile failed. Report error.
    dwError = GetLastError ();
}

---

Did you try this?

i tried that but i have got probs in my main what should i have in there other than
/*
*
* controller.cpp
*
*
*
*
*/

#include <windows.h>
#include "carcontrol.h"


/************************************************** *********************

WINMAIN ( HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPTSTR lpCmdLine,
int nCmdShow)

************************************************** *********************/

int WINAPI WinMain( HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPTSTR lpCmdLine,
int nCmdShow)


{

DWORD dwError;
hPort = INVALID_HANDLE_VALUE; // Serial port handle
hReadThread = NULL; // Handle to the read thread



lpszDevName = TEXT("COM1:");

// Initialize the port.
if (!PortInitialize (lpszDevName))
{
return 0 ;
}



PortClose(hPort) ;


return 0 ;

}


because at the moment nothing is been sent to the serial port
:)
ps thanks for your help

> because at the moment nothing is been sent to the serial port
Well your main only seems to open and close the port

Perhaps you should attach more code - this board supports attachments.