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    <p>This is the PIL's grabscreen source, Its does not accept any parameters, and Its grab the whole screen and convert it to bitmap.</p> <pre><code>PyImaging_GrabScreenWin32(PyObject* self, PyObject* args) { int width, height; HBITMAP bitmap; BITMAPCOREHEADER core; HDC screen, screen_copy; PyObject* buffer; /* step 1: create a memory DC large enough to hold the entire screen */ screen = CreateDC(";DISPLAY", NULL, NULL, NULL); screen_copy = CreateCompatibleDC(screen); width = GetDeviceCaps(screen, HORZRES); height = GetDeviceCaps(screen, VERTRES); bitmap = CreateCompatibleBitmap(screen, width, height); if (!bitmap) goto error; if (!SelectObject(screen_copy, bitmap)) goto error; /* step 2: copy bits into memory DC bitmap */ if (!BitBlt(screen_copy, 0, 0, width, height, screen, 0, 0, SRCCOPY)) goto error; /* step 3: extract bits from bitmap */ buffer = PyString_FromStringAndSize(NULL, height * ((width*3 + 3) &amp; -4)); if (!buffer) return NULL; core.bcSize = sizeof(core); core.bcWidth = width; core.bcHeight = height; core.bcPlanes = 1; core.bcBitCount = 24; if (!GetDIBits(screen_copy, bitmap, 0, height, PyString_AS_STRING(buffer), (BITMAPINFO*) &amp;core, DIB_RGB_COLORS)) goto error; DeleteObject(bitmap); DeleteDC(screen_copy); DeleteDC(screen); return Py_BuildValue("(ii)N", width, height, buffer); error: PyErr_SetString(PyExc_IOError, "screen grab failed"); DeleteDC(screen_copy); DeleteDC(screen); return NULL; } </code></pre> <p>So, when I just go a little deep, found C approach is good</p> <p><a href="http://msdn.microsoft.com/en-us/library/dd144909(VS.85).aspx" rel="nofollow noreferrer">http://msdn.microsoft.com/en-us/library/dd144909(VS.85).aspx</a></p> <p>And Python has ctypes, so here is my approach using ctypes (in Windows 10, <code>winnt</code> has been replaced with <code>Windows</code>):</p> <pre><code>&gt;&gt;&gt; from ctypes import * &gt;&gt;&gt; user= windll.LoadLibrary("c:\\winnt\\system32\\user32.dll") #I am in windows 2000, may be yours will be windows &gt;&gt;&gt; h = user.GetDC(0) &gt;&gt;&gt; gdi= windll.LoadLibrary("c:\\winnt\\system32\\gdi32.dll") &gt;&gt;&gt; gdi.GetPixel(h,1023,767) 16777215 #I believe its white color of RGB or BGR value, #FFFFFF (according to msdn it should be RGB) &gt;&gt;&gt; gdi.GetPixel(h,1024,767) -1 #because my screen is only 1024x768 </code></pre> <p>You could write a wrapper for function GetPixel like this</p> <pre><code>from ctypes import windll dc= windll.user32.GetDC(0) def getpixel(x,y): return windll.gdi32.GetPixel(dc,x,y) </code></pre> <p>Then you can use like <code>getpixel(0,0)</code>, <code>getpixel(100,0)</code>, etc...</p> <p><s>PS: Mine is Windows 2000, so I put <code>winnt</code> in the path, you may need to change it to <code>windows</code> or you chould completely remove path, just using <code>user32.dll</code> and <code>gdi32.dll</code> should work too.</s></p>
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    1. COThanks a bunch. This sped up screen reading NOTICEABLY. I can read as fast as I want now with virtually no slowdown. ;)
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    2. COI tried the above syntax for ctypes and couldn't get it working with LoadLibrary. The wrapper function code is exactly what I was looking for.
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