C / C++ / MFC

#define TMP_THIS_FILE SimpleTrace_cpp<br />
#define TMP_EVAL(_value_) _value_<br />
#define TMP_(Id) TMP_EVAL(TMPFUNC_) ## TMP_EVAL(Id) ## TMP_EVAL(_) ## TMP_EVAL(TMP_THIS_FILE) ## TMP_EVAL(__LINE__)<br />
<br />
#define doTrace TMP_(CALL)

void CALLBACK OnReceiveComplete(...)
{
	if(cbTransferred == 0)
	{
		// Doesn't get here until after a long timeout.
		printf("Done.\r\n");
	}
	else
	{
		printf("Received %d bytes.\r\n", cbTransferred);
		WSARecv(..., &OnReceiveComplete);
	}
}

void CALLBACK OnSendComplete(...)
{
	printf("Sent %d bytes.\r\n", cbTransferred);
	WSARecv(..., &OnReceiveComplete);
}

void Game_Run()<br />
{<br />
	//the is called once ever frame<br />
	//do not include your own loop here!<br />
<br />
	int x = 0, y = 0;<br />
	RECT rect;<br />
	GetClientRect(global_hwnd, &rect);<br />
<br />
	if (rect.right > 0)<br />
	{<br />
		x = rand() % (rect.right - rect.left);<br />
		y = rand() % (rect.bottom - rect.top);<br />
		DrawBitmap(global_hdc, "c.bmp", x, y);<br />
	}<br />
}

void DrawBitmap(HDC hdcDest, char *filename, int x, int y)<br />
{<br />
	HBITMAP image;<br />
	BITMAP bm;<br />
	HDC hdcMem;<br />
<br />
	//load the bitmap image<br />
		image = LoadImage(0,"c.bmp",IMAGE_BITMAP,0,0,LR_LOADFROMFILE);<br />
<br />
	//read the bitmaps properties<br />
	GetObject(image, sizeof(BITMAP), &bm);<br />
<br />
	//create a device context for the bitmap<br />
	hdcMem = CreateCompatibleDC(global_hdc);<br />
	SelectObject(hdcMem, image);<br />
<br />
	//draw the bitmap to the window ( bit block transfer)<br />
	BitBlt(<br />
		global_hdc,					//destination device context<br />
		x,y,						//x,y location on destination<br />
		bm.bmWidth, bm.bmHeight,	//width, height of source bitmap<br />
		hdcMem,						//source bitmap device context<br />
		0,0,						//start x,y on source bitmap	<br />
		SRCCOPY);					//blit method<br />
<br />
	//delete the device context and bitmap<br />
	DeleteDC(hdcMem);<br />
	DeleteObject((HBITMAP)image);<br />
	ShowWindow(global_hwnd, SW_SHOW);<br />
}

<br />
<br />
	SOCKADDR_IN InternetAddr;<br />
	InternetAddr.sin_family = AF_INET;<br />
	InternetAddr.sin_addr.s_addr = htonl(inet_addr("1.2.3.4"));<br />
	InternetAddr.sin_port = htons(18);<br />
<br />
Connection = socket (AF_INET, SOCK_DGRAM, IPPROTO_UDP);<br />
connect(Connection, (SOCKADDR *)&InternetAddr, sizeof(InternetAddr);<br />
<br />