Winform：无法使用Pywinauto控制任何按钮或UI元素

Question

检查输出：

How found:  Selected from tree...
Name:   "Install Service"
ControlType:    UIA_ButtonControlTypeId (0xC350)
LocalizedControlType:   "button"
BoundingRectangle:  {l:819 t:599 r:920 b:622}
IsEnabled:  true
IsOffscreen:    false
IsKeyboardFocusable:    true
HasKeyboardFocus:   false
AccessKey:  ""
ProcessId:  5924
RuntimeId:  [2A.1A50414]
AutomationId:   "btnInstallSvc"
FrameworkId:    "WinForm"
ClassName:  "WindowsForms10.BUTTON.app.0.141b42a_r9_ad1"
NativeWindowHandle: 0x1A50414
ProviderDescription:    "[pid:18028,providerId:0x1A50414 Main:Nested [pid:5924,providerId:0x1A50414 Main(parent link):Microsoft: MSAA Proxy (unmanaged:uiautomationcore.dll)]; Hwnd(parent link):Microsoft: HWND Proxy (unmanaged:uiautomationcore.dll)]"
IsPassword: false
HelpText:   ""

错误：pywintypes.error: (1400, 'GetWindowRect', 'Invalid window handle.')