ctypes.ArgumentError: argument 1: : expected LP_POINT instance instead of pointer to POINT

Reported on StackOverflow: https://stackoverflow.com/q/57304399/3648361

Expected Behavior

Actual Behavior

ctypes.windll.user32.GetCursorPos(ctypes.byref(cursor))
ctypes.ArgumentError: argument 1: : expected LP_POINT instance instead of pointer to POINT

Steps to Reproduce the Problem

1. Install pywinauto
2. Install pyautogui==0.9.47
3. Run the mentioned code

Short Example of Code to Demonstrate the Problem

slider = content_of_page.find_element_by_id("SystemSettings_Display_Brightness_Slider")
slider.click()
pyautogui.dragRel(args.value, 0, duration=1.0, button='left')
pyautogui.click()

Specifications

• Pywinauto version: unknown
• Python version and bitness: unknown
• Platform and OS: Windows

We should think on how to eliminate such errors even if another library behaves incorrectly. Maybe do explicit type conversion for every Win32 API function call.

[airelil]

@vasily-v-ryabov, might be worth exploring an old suggestion from https://bugs.python.org/issue22552

If you want cached libs without polluting ctypes.cdll or ctypes.windll, just create your own instance such as windll = ctypes.LibraryLoader(ctypes.WinDLL).

[vasily-v-ryabov]

Well, it is fixed in master branch. Closing it before next release 0.6.8 (hope the last 0.6.x one).