I am attempting to modify some Python code that takes a screenshot of a particular application window in Windows 10. I am trying to use the win32ui / win32gui modules from the pywin32 package for this purpose. Here is the broken code:
def getWindow():
name = "Windows PowerShell"
window = win32ui.FindWindow(None, name)
windowDC = win32gui.GetWindowDC(window)
The last line causes the error. Here is the relevant portion of the console output:
File ".\fake_file_name.py", line 9, in getWindow
windowDC = win32gui.GetWindowDC(window)
TypeError: The object is not a PyHANDLE object
I'm not very familiar with Python's type system or error messages, but this error makes it seem like GetWindowDC was expecting an argument with type PyHANDLE. The documentation I could find for win32gui.FindWindow makes it seem like a PyHANDLE is indeed the output type.
On the other hand, these very similar lines of code came from a function that does work:
hwin = win32gui.GetDesktopWindow()
hwindc = win32gui.GetWindowDC(hwin)
Here is the doc page for win32gui.GetDesktopWindow. If the previously shown error message didn't specifically mention PyHANDLE, I would just assume that FindWindow and GetDesktopWindow return different and incompatible types.
Can someone help me understand what this error message means and why it is appearing? I would also be interested in example code that gets a device context for a window with the name "Windows Powershell", as my broken code attempted to do.
Other info:
Documentation page for win32gui.GetWindowDC
You can use EnumWindows(),this will search all the window,Read it in MSDN doc:
import win32gui
def getShell():
thelist = []
def findit(hwnd,ctx):
if win32gui.GetWindowText(hwnd) == "Windows PowerShell": # check the title
thelist.append(hwnd)
win32gui.EnumWindows(findit,None)
return thelist
b = getShell()
print(b) # b is the list of hwnd,contains those windows title is "Windows PowerShell"