C / C++ / MFC

char *buffer;
buffer = new char[bufferSize + extraSize];
// ... fill the payload buffer with data here ...

// ... append extra payload here ...

// send the payload.
sendto(socket, buffer, bufferSize + extraSize, flags, &destAddr, destaddrSize);

#define ARROW 1<br />
#define ALLSIZE 2<br />

BadJerry wrote:

using Javascript to get the broswer version

var exp  = new RegExp("MSIE ([0-9]{1,}[\.0-9]{0,})");
var version = 0;
if (null != exp.exec(navigator.userAgent)) {
	version = parseFloat( RegExp.$1 )
}

struct RXData {
      double    timeStamp;              
      double    item1;           
      long	item2;       
      double    item3;      
      int	 flag1;      
      bool	state;  
}

float swap(float d) 
{ 
	float a; 
	unsigned char *dst = (unsigned char *)&a; 
	unsigned char *src = (unsigned char *)&d; 
	dst[0] = src[3];
	dst[1] = src[2];
	dst[2] = src[1];
	dst[3] = src[0]; 
	return a; 
} 

short byteSwap16(short value)
{
  short newValue = 0;
  char* pnewValue = (char*) &newValue;
  char* poldValue = (char*) &value;
 
  pnewValue[0] = poldValue[1];
  pnewValue[1] = poldValue[0];
 
  return newValue;
}
 
unsigned long byteSwap32(unsigned long value)
{
  unsigned long  newValue = 0;
  char* pnewValue = (char *) &newValue;
  char* poldValue = (char *) &value;
 
  pnewValue[0] = poldValue[3];
  pnewValue[1] = poldValue[2];
  pnewValue[2] = poldValue[1];
  pnewValue[3] = poldValue[0];
 
  return newValue ;
}

RxData.timeStamp = swap(RxData.timeStamp