int nBytes;//number of bytes we expect to recieve...	#define MAX_SIZE 13//max size of our packet	float val1 = 0.0f;//the valuue of the float we recieve        float val2 = 0.0f//float2        float val3 = 0.0f//float3	char buffer[13];//our buffer	char id=19;//the ID that the server wil evaluate	memcpy(buffer, (char*)&id,1);//copy our message id into the buffer	size = htonl(size);//makes sure size is still kool with the server//send the size the server should expect....and make sure there were no errors sending		if ((nBytes = send(mySocket, (char*)&size, sizeof(size), 0)) == SOCKET_ERROR) {			printf("Send Failed!\n");//say we do have an error		}				size = ntohl(size);//make sure our size is still kool		//send the actual id		if ((nBytes = send(mySocket,buffer, size, 0)) == SOCKET_ERROR) {			printf("Send Failed!\n");		}	//recieve the size		nBytes = recv(mySocket, (char*)&size, sizeof(size), 0);		//recieve the float        nBytes = recv(mySocket, buffer, size, 0);//copy the id, first float, second and third        memcpy(&id, buffer,1);        memcpy(&val, buffer+1, 4);        memcpy(&val, buffer+5, 4);	memcpy(&val, buffer+9, 4);		//do we have an error		if (nBytes == SOCKET_ERROR) {			printf("Recv Failed!\n");		} 		else 		{						printf("Reply Received The Number Is : %d\n", val);		}		Sleep(9000);

//heres the server code        int nBytes;//number of bytes we will recieve        #define MAX_SIZE 13//max size of our buffer	char buffer[MAX_SIZE];//our buffer to send	unsigned long size;//how much we will recieve//recieve size from the client	nBytes = recv(clientSocket, (char*)&size, sizeof(size), 0);//did we get an error? and deal with it if we did	if (nBytes == SOCKET_ERROR) {		int error = WSAGetLastError();	   if (error == WSAECONNRESET) {		WaitForSingleObject(mutexHandle, INFINITE);		FD_CLR(clientSocket, &masterSet);		ReleaseMutex(mutexHandle);		closesocket(clientSocket);		printf("client on %d disconnected\n", clientSocket);		continue;		} else {		printf("Recv Failed!\n");		gQuitFlag = true;		break;	    }	}	if (nBytes == 0) {//if we dont have anything		WaitForSingleObject(mutexHandle, INFINITE);		FD_CLR(clientSocket, &masterSet);		ReleaseMutex(mutexHandle);		closesocket(clientSocket);		printf("client on %d disconnected\n", clientSocket);		continue;	}	size = ntohl(size);//make sure size is kool with the client	float val1;        float val2;	float val3;	char id = 19;//random id we chose for send floats	nBytes = recv(clientSocket, buffer, size, 0);//recieve the id	//if we have an error	if (nBytes == SOCKET_ERROR) {		printf("Recv Failed!\n");		gQuitFlag = true;		break;	}							val1 =  1.0f;//we chose 1.0 randomly for this program        val2 = 1.0f;        val3 = 1.0f;	memcpy(buffer, &id, 1);//copy id to our buffer	memcpy(buffer+1,(char*)&val1,sizeof(val));//copy our first float	memcpy(buffer+5,(char*)&val2,sizeof(val));//copy our second	memcpy(buffer+9,(char*)&val3,sizeof(val));//copy our third	send(clientSocket, (char*)&size, sizeof(size), 0);//send the size of our packet	send(clientSocket, buffer, 13, 0);//send the actual packet	printf("Float sent to client %d. \n", clientSocket);//ran good		printf("Message Received from client on %d : %s\n", clientSocket, buffer);//worked out ok

struct PosMessage{  float x,y,z;  unsigned int someStuffYouMightNeed;}//Client........PosMessage msg;msg.x = 3.145f;msg.y = 12.5f;msg.z = 9.5f;msg.someExtraStuffYouMightNeed = 0xDEADBEEF;int msgType = ID_MSG_POSITION;send(socket,(char*)&msgType,sizeof(msgType),0);send(socket,(char*)&msg,sizeof(msg),0);//Server.........int msgType;recv(socket,(char*)&msgType,sizeof(msgType),0);switch (msgType){ case ID_MSG_POSITION:  {    PosMessage msg;    recv(socket,(char*)&msg,sizeof(msg),0);    //do something with msg......  }  break; case .....:  ....  ....  break; default:  printf("Error, unknown message received.\n");  break;}