Fastest way to take a screenshot with python on windows

Question

What\'s the fastest way to take a screenshot on windows? PIL.ImageGrab is rather slow.. it takes between 4-5 seconds to take 30 screenshots of the same small wi

Answer 1

You could use win32 APIs directly .

1) First give the focus to the App that you want to take screenshot of. link text

2) Win32 API can help with the screenshot:

import win32gui
import win32ui 
hwnd = win32gui.FindWindow(None, windowname)
wDC = win32gui.GetWindowDC(hwnd)
dcObj=win32ui.CreateDCFromHandle(wDC)
cDC=dcObj.CreateCompatibleDC()
dataBitMap = win32ui.CreateBitmap()
dataBitMap.CreateCompatibleBitmap(dcObj, w, h)
cDC.SelectObject(dataBitMap)
cDC.BitBlt((0,0),(w, h) , dcObj, (0,0), win32con.SRCCOPY)
dataBitMap.SaveBitmapFile(cDC, bmpfilenamename)
# Free Resources
dcObj.DeleteDC()
cDC.DeleteDC()
win32gui.ReleaseDC(hwnd, wDC)
win32gui.DeleteObject(dataBitMap.GetHandle())