（C+；+；/Python）不带插入符号指示器的捕获窗口屏幕截图

我想通过Python捕获现有运行窗口的屏幕截图。
以下是捕获记事本窗口的示例代码：

import time
import win32gui
import win32ui
import win32con
import pyautogui


def getWindowScreenshot(hwnd, output_file):
    r = win32gui.GetWindowRect(hwnd)
    width = r[2] - r[0]
    height = r[3] - r[1]
    wDC = win32gui.GetWindowDC(hwnd)
    dcObj = win32ui.CreateDCFromHandle(wDC)
    cDC = dcObj.CreateCompatibleDC()
    dataBitMap = win32ui.CreateBitmap()
    dataBitMap.CreateCompatibleBitmap(dcObj, width, height)
    cDC.SelectObject(dataBitMap)
    cDC.BitBlt((0, 0), (width, height), dcObj, (0, 0), win32con.SRCCOPY)

    # save the bitmap to a file
    dataBitMap.SaveBitmapFile(cDC, output_file)

    dcObj.DeleteDC()
    cDC.DeleteDC()
    win32gui.ReleaseDC(hwnd, wDC)
    win32gui.DeleteObject(dataBitMap.GetHandle())


# Press the green button in the gutter to run the script.
if __name__ == '__main__':

    window_title = "Untitled - Notepad"
    winHandle = win32gui.FindWindow(None, window_title)
    if winHandle == 0:
        raise RuntimeError(f"Window '{window_title}' is not opening!")

    # Bring the window to foreground in case it is overlap by other windows
    win32gui.SetForegroundWindow(winHandle)
    # Do something with Notepad
    time.sleep(3)

    # Capture the window
    getWindowScreenshot(winHandle, "output.bmp")

但是，有时捕获的图像在输入文本框上会有闪烁的插入符号指示灯。
我的问题是，如何在没有插入符号的情况下捕获屏幕截图

我已经尝试了一些解决方案，但不适合： 解决方案1:

# Bring the window to foreground in case it is overlap by other windows
    win32gui.SetForegroundWindow(winHandle)
    # Do something with Notepad
    time.sleep(3)

    # Make the "Desktop window" focus
    win32gui.SetForegroundWindow(win32gui.GetDesktopWindow())

    # Capture the window
    getWindowScreenshot(winHandle, "output.bmp")

# Bring the window to foreground in case it is overlap by other windows
    win32gui.SetForegroundWindow(winHandle)
    # Do something with Notepad
    time.sleep(3)

    # Click outside of window
    r = win32gui.GetWindowRect(winHandle)
    pyautogui.click(r[2]+1, r[3]+1)

    # Capture the window
    getWindowScreenshot(winHandle, "output.bmp")

在捕获屏幕截图之前，请尝试将“桌面”设置为前景窗口。
但是，命令

win32gui.setforegroundindow（win32gui.GetDesktopWindow（））

将引发错误：

pywintypes.error: (0, 'SetForegroundWindow', 'No error message is available')

解决方案2:

# Bring the window to foreground in case it is overlap by other windows
    win32gui.SetForegroundWindow(winHandle)
    # Do something with Notepad
    time.sleep(3)

    # Make the "Desktop window" focus
    win32gui.SetForegroundWindow(win32gui.GetDesktopWindow())

    # Capture the window
    getWindowScreenshot(winHandle, "output.bmp")

# Bring the window to foreground in case it is overlap by other windows
    win32gui.SetForegroundWindow(winHandle)
    # Do something with Notepad
    time.sleep(3)

    # Click outside of window
    r = win32gui.GetWindowRect(winHandle)
    pyautogui.click(r[2]+1, r[3]+1)

    # Capture the window
    getWindowScreenshot(winHandle, "output.bmp")

将

win32gui.SetForegroundWindow（win32gui.GetDesktopWindow（））

替换为

win32gui.ShowWindow（winHandle，4）

，其中

4

是

SW\u SHOWNOACTIVATE

。 代码运行正常，但记事本窗口在执行后不会失去焦点

解决方案3:

# Bring the window to foreground in case it is overlap by other windows
    win32gui.SetForegroundWindow(winHandle)
    # Do something with Notepad
    time.sleep(3)

    # Make the "Desktop window" focus
    win32gui.SetForegroundWindow(win32gui.GetDesktopWindow())

    # Capture the window
    getWindowScreenshot(winHandle, "output.bmp")

# Bring the window to foreground in case it is overlap by other windows
    win32gui.SetForegroundWindow(winHandle)
    # Do something with Notepad
    time.sleep(3)

    # Click outside of window
    r = win32gui.GetWindowRect(winHandle)
    pyautogui.click(r[2]+1, r[3]+1)

    # Capture the window
    getWindowScreenshot(winHandle, "output.bmp")

使用此解决方案，我尝试在记事本窗口外单击（单击桌面）。此代码似乎可以工作，但如果记事本窗口后面有另一个窗口，则无法工作，如下所示：

执行代码时，它将单击Windows资源管理器窗口。因此，代码可以意外地执行单击操作（例如：意外删除系统文件？）

解决方案4 （摘自@SongZhu MSFT）

当我运行代码时，我仍然看到插入符号始终显示。 和

output.bmp

+

output1.bmp

仍然存在一个带插入符号的图像

系统信息：

• 视窗101909
• Python 3.7.9

---

测试后，我可以使用

SendMessageW

发送

WM\u KILLFOCUS

使插入符号消失

这是对我有用的代码：

import time
import win32gui
import win32ui
import win32con
import pyautogui
from ctypes import windll

def getWindowScreenshot(hwnd, output_file):
    r = win32gui.GetWindowRect(hwnd)
    width = r[2] - r[0]
    height = r[3] - r[1]
    wDC = win32gui.GetWindowDC(hwnd)
    dcObj = win32ui.CreateDCFromHandle(wDC)
    cDC = dcObj.CreateCompatibleDC()
    dataBitMap = win32ui.CreateBitmap()
    dataBitMap.CreateCompatibleBitmap(dcObj, width, height)
    cDC.SelectObject(dataBitMap)
    cDC.BitBlt((0, 0), (width, height), dcObj, (0, 0), win32con.SRCCOPY)

    # save the bitmap to a file
    dataBitMap.SaveBitmapFile(cDC, output_file)

    dcObj.DeleteDC()
    cDC.DeleteDC()
    win32gui.ReleaseDC(hwnd, wDC)
    win32gui.DeleteObject(dataBitMap.GetHandle())


if __name__ == '__main__':

    window_title = "Untitled - Notepad"
    winHandle = win32gui.FindWindow(None, window_title)
    if winHandle == 0:
        raise RuntimeError(f"Window '{window_title}' is not opening!")

    # Bring the window to foreground in case it is overlap by other windows
    win32gui.SetForegroundWindow(winHandle)
    # Do something with Notepad
    windll.user32.SendMessageW(winHandle, win32con.WM_KILLFOCUS, None, None)
    # Capture the window
    getWindowScreenshot(winHandle, "output.bmp")
    time.sleep(0.5)
    getWindowScreenshot(winHandle, "output1.bmp")

---

我认为正确的术语是“聚焦”；也许你可以使用

win32gui.SetFocus（0）

或者类似的东西？@anatolyg，我试过

win32gui.SetFocus（0）

，但还是不起作用。记事本窗口仍处于焦点状态，然后调用。我测试了代码，似乎在单击窗口时会出现插入符号。也许您可以使用

win32gui.EnableWindow（winHandle，False）

并在捕获后调用

win32gui.EnableWindow（winHandle，True）

在睡眠前调用

EnableWindow

，比如：

win32gui.SetForegroundWindow（winHandle）win32gui.EnableWindow（winHandle，False）time.sleep（3）

SendMessageW（WM_KILLFOCUS）

也为我工作。谢谢！