dotnet / dotnet/wpf

The main thread of the WPF application that starts automatically at boot will forever wait for the touch thread to execute

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area-Touch Bug
Dominant language
C#
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Description

* .NET Core Version:3.1.300
* Windows version: 10.0.18362
* Does the bug reproduce also in WPF for .NET Framework 4.8?: Yes

**Problem description:**

The WPF application does not show the main window.

Because the main thread is waiting for the logic execution of the Stylus Input thread.

![](http://image.acmx.xyz/lindexi%2F20206161131494577.jpg)

The main thread execution waiting method is [PresentationCore.dll! System.Windows.Input.PenThreadWorker.WorkerGetTabletsInfo() ](https://github.com/dotnet/wpf/blob/08dc7bcdecb27ab25d279d0b9d05f35393852ae9/src/Microsoft.DotNet.Wpf/src/PresentationCore/System/Windows/Input/Stylus/Wisp/PenThreadWorker.cs#L574)

https://github.com/dotnet/wpf/blob/08dc7bcdecb27ab25d279d0b9d05f35393852ae9/src/Microsoft.DotNet.Wpf/src/PresentationCore/System/Windows/Input/Stylus/Wisp/PenThreadWorker.cs#L574-L592

![](http://image.acmx.xyz/lindexi%2F2020616114732306.jpg)

![](http://image.acmx.xyz/lindexi%2F20206161149181309.jpg)

What is the Stylus Input thread doing at this time? It is waiting for touch input

![](http://image.acmx.xyz/lindexi%2F20206161154445424.jpg)

So the main thread cannot wait for the execution of the Stylus Input thread to complete, the main thread will always wait

**Actual behavior:**

The main thread callstack

```
WindowsBase.dll!System.Windows.Threading.DispatcherSynchronizationContext.Wait(System.IntPtr[] waitHandles, bool waitAll, int millisecondsTimeout) (IL=epilog, Native=0x6C9DB400+0x23)
mscorlib.dll!System.Threading.SynchronizationContext.InvokeWaitMethodHelper(System.Threading.SynchronizationContext syncContext, System.IntPtr[] waitHandles, bool waitAll, int millisecondsTimeout) (IL=epilog, Native=0x6EC55D30+0x14)
mscorlib.dll!System.Threading.WaitHandle.InternalWaitOne(System.Runtime.InteropServices.SafeHandle waitableSafeHandle, long millisecondsTimeout, bool hasThreadAffinity, bool exitContext) (IL≈0x0014, Native=0x6EC56B10+0x21)
mscorlib.dll!System.Threading.WaitHandle.WaitOne(int millisecondsTimeout, bool exitContext) (IL≈0x0000, Native=0x6EC56AD0+0x28)
mscorlib.dll!System.Threading.WaitHandle.WaitOne() (IL=epilog, Native=0x6EC56AB0+0x12)
PresentationCore.dll!System.Windows.Input.PenThreadWorker.WorkerGetTabletsInfo() (IL≈0x002F, Native=0x6C420C30+0xBE)
PresentationCore.dll!System.Windows.Input.StylusWisp.WispTabletDeviceCollection.UpdateTabletsImpl() (IL=epilog, Native=0x6C439AB8+0x64)
PresentationCore.dll!System.Windows.Input.StylusWisp.WispTabletDeviceCollection.UpdateTablets() (IL=0x0042, Native=0x6C439A24+0x5A)
PresentationCore.dll!System.Windows.Input.StylusWisp.WispTabletDeviceCollection.WispTabletDeviceCollection() (IL≈0x003D, Native=0x6BF31B38+0xC2)
PresentationCore.dll!System.Windows.Input.StylusWisp.WispLogic.WispTabletDevices.get() (IL=0x000E, Native=0x6BF5DF4C+0x20)
PresentationCore.dll!System.Windows.Input.StylusWisp.WispLogic.OnDeviceChange() (IL≈0x000F, Native=0x6C3E9830+0x20)
PresentationCore.dll!System.Windows.Input.StylusWisp.WispLogic.HandleMessage(MS.Internal.Interop.WindowMessage msg, System.IntPtr wParam, System.IntPtr lParam) (IL=0x004C, Native=0x6C3E85C0+0x73)
PresentationFramework.dll!System.Windows.SystemResources.InvalidateTabletDevices(MS.Internal.Interop.WindowMessage msg, System.IntPtr wParam, System.IntPtr lParam) (IL=epilog, Native=0x6B3EA58C+0x9D)
PresentationFramework.dll!System.Windows.SystemResources.SystemThemeFilterMessage(System.IntPtr hwnd, int msg, System.IntPtr wParam, System.IntPtr lParam, ref bool handled) (IL≈0x0094, Native=0x6AC6FC60+0x96)
WindowsBase.dll!MS.Win32.HwndWrapper.WndProc(System.IntPtr hwnd, int msg, System.IntPtr wParam, System.IntPtr lParam, ref bool handled) (IL≈0x0030, Native=0x6C9DC1F0+0x9B)
WindowsBase.dll!MS.Win32.HwndSubclass.DispatcherCallbackOperation(object o) (IL≈0x0036, Native=0x6C9DC170+0x6B)
WindowsBase.dll!System.Windows.Threading.ExceptionWrapper.InternalRealCall(System.Delegate callback, object args, int numArgs) (IL≈0x0077, Native=0x6C9DC010+0x52)
WindowsBase.dll!System.Windows.Threading.ExceptionWrapper.TryCatchWhen(object source, System.Delegate callback, object args, int numArgs, System.Delegate catchHandler) (IL≈0x0002, Native=0x6C9DBF70+0x34)
WindowsBase.dll!System.Windows.Threading.Dispatcher.LegacyInvokeImpl(System.Windows.Threading.DispatcherPriority priority, System.TimeSpan timeout, System.Delegate method, object args, int numArgs) (IL≈0x00BB, Native=0x6C9DA450+0x131)
WindowsBase.dll!MS.Win32.HwndSubclass.SubclassWndProc(System.IntPtr hwnd, int msg, System.IntPtr wParam, System.IntPtr lParam) (IL=0x0130, Native=0x6C9DB9C0+0xEE)
WindowsBase.dll!System.Windows.Threading.DispatcherSynchronizationContext.Wait(System.IntPtr[] waitHandles, bool waitAll, int millisecondsTimeout) (IL=epilog, Native=0x6C9DB400+0x23)
mscorlib.dll!System.Threading.SynchronizationContext.InvokeWaitMethodHelper(System.Threading.SynchronizationContext syncContext, System.IntPtr[] waitHandles, bool waitAll, int millisecondsTimeout) (IL=epilog, Native=0x6EC55D30+0x14)
mscorlib.dll!System.Threading.WaitHandle.InternalWaitOne(System.Runtime.InteropServices.SafeHandle waitableSafeHandle, long millisecondsTimeout, bool hasThreadAffinity, bool exitContext) (IL≈0x0014, Native=0x6EC56B10+0x21)
mscorlib.dll!System.Threading.WaitHandle.WaitOne(int millisecondsTimeout, bool exitContext) (IL≈0x0000, Native=0x6EC56AD0+0x28)
mscorlib.dll!System.Threading.WaitHandle.WaitOne() (IL=epilog, Native=0x6EC56AB0+0x12)
PresentationCore.dll!System.Windows.Input.PenThreadWorker.WorkerGetTabletsInfo() (IL≈0x002F, Native=0x6C420C30+0xBE)
PresentationCore.dll!System.Windows.Input.StylusWisp.WispTabletDeviceCollection.UpdateTabletsImpl() (IL=epilog, Native=0x6C439AB8+0x64)
PresentationCore.dll!System.Windows.Input.StylusWisp.WispTabletDeviceCollection.UpdateTablets() (IL=0x0042, Native=0x6C439A24+0x5A)
PresentationCore.dll!System.Windows.Input.StylusWisp.WispTabletDeviceCollection.WispTabletDeviceCollection() (IL≈0x003D, Native=0x6BF31B38+0xC2)
PresentationCore.dll!System.Windows.Input.StylusWisp.WispLogic.WispTabletDevices.get() (IL=0x000E, Native=0x6BF5DF4C+0x20)
PresentationCore.dll!System.Windows.Input.StylusWisp.WispLogic.OnDeviceChange() (IL≈0x000F, Native=0x6C3E9830+0x20)
PresentationCore.dll!System.Windows.Input.StylusWisp.WispLogic.HandleMessage(MS.Internal.Interop.WindowMessage msg, System.IntPtr wParam, System.IntPtr lParam) (IL=0x004C, Native=0x6C3E85C0+0x73)
PresentationFramework.dll!System.Windows.SystemResources.InvalidateTabletDevices(MS.Internal.Interop.WindowMessage msg, System.IntPtr wParam, System.IntPtr lParam) (IL=epilog, Native=0x6B3EA58C+0x9D)
PresentationFramework.dll!System.Windows.SystemResources.SystemThemeFilterMessage(System.IntPtr hwnd, int msg, System.IntPtr wParam, System.IntPtr lParam, ref bool handled) (IL≈0x0094, Native=0x6AC6FC60+0x96)
WindowsBase.dll!MS.Win32.HwndWrapper.WndProc(System.IntPtr hwnd, int msg, System.IntPtr wParam, System.IntPtr lParam, ref bool handled) (IL≈0x0030, Native=0x6C9DC1F0+0x9B)
WindowsBase.dll!MS.Win32.HwndSubclass.DispatcherCallbackOperation(object o) (IL≈0x0036, Native=0x6C9DC170+0x6B)
WindowsBase.dll!System.Windows.Threading.ExceptionWrapper.InternalRealCall(System.Delegate callback, object args, int numArgs) (IL≈0x0077, Native=0x6C9DC010+0x52)
WindowsBase.dll!System.Windows.Threading.ExceptionWrapper.TryCatchWhen(object source, System.Delegate callback, object args, int numArgs, System.Delegate catchHandler) (IL≈0x0002, Native=0x6C9DBF70+0x34)
WindowsBase.dll!System.Windows.Threading.Dispatcher.LegacyInvokeImpl(System.Windows.Threading.DispatcherPriority priority, System.TimeSpan timeout, System.Delegate method, object args, int numArgs) (IL≈0x00BB, Native=0x6C9DA450+0x131)
WindowsBase.dll!MS.Win32.HwndSubclass.SubclassWndProc(System.IntPtr hwnd, int msg, System.IntPtr wParam, System.IntPtr lParam) (IL=0x0130, Native=0x6C9DB9C0+0xEE)
WindowsBase.dll!System.Windows.Threading.DispatcherSynchronizationContext.Wait(System.IntPtr[] waitHandles, bool waitAll, int millisecondsTimeout) (IL=epilog, Native=0x6C9DB400+0x23)
mscorlib.dll!System.Threading.SynchronizationContext.InvokeWaitMethodHelper(System.Threading.SynchronizationContext syncContext, System.IntPtr[] waitHandles, bool waitAll, int millisecondsTimeout) (IL=epilog, Native=0x6EC55D30+0x14)
mscorlib.dll!System.Threading.WaitHandle.InternalWaitOne(System.Runtime.InteropServices.SafeHandle waitableSafeHandle, long millisecondsTimeout, bool hasThreadAffinity, bool exitContext) (IL≈0x0014, Native=0x6EC56B10+0x21)
mscorlib.dll!System.Threading.WaitHandle.WaitOne(int millisecondsTimeout, bool exitContext) (IL≈0x0000, Native=0x6EC56AD0+0x28)
mscorlib.dll!System.Threading.WaitHandle.WaitOne() (IL=epilog, Native=0x6EC56AB0+0x12)
PresentationCore.dll!System.Windows.Input.PenThreadWorker.WorkerGetTabletsInfo() (IL≈0x002F, Native=0x6C420C30+0xBE)
PresentationCore.dll!System.Windows.Input.StylusWisp.WispTabletDeviceCollection.UpdateTabletsImpl() (IL=epilog, Native=0x6C439AB8+0x64)
PresentationCore.dll!System.Windows.Input.StylusWisp.WispTabletDeviceCollection.UpdateTablets() (IL=0x0042, Native=0x6C439A24+0x5A)
PresentationCore.dll!System.Windows.Input.StylusWisp.WispTabletDeviceCollection.WispTabletDeviceCollection() (IL≈0x003D, Native=0x6BF31B38+0xC2)
PresentationCore.dll!System.Windows.Input.StylusWisp.WispLogic.WispTabletDevices.get() (IL=0x000E, Native=0x6BF5DF4C+0x20)
PresentationCore.dll!System.Windows.Input.StylusWisp.WispLogic.OnDeviceChange() (IL≈0x000F, Native=0x6C3E9830+0x20)
PresentationCore.dll!System.Windows.Input.StylusWisp.WispLogic.HandleMessage(MS.Internal.Interop.WindowMessage msg, System.IntPtr wParam, System.IntPtr lParam) (IL=0x004C, Native=0x6C3E85C0+0x73)
PresentationFramework.dll!System.Windows.SystemResources.InvalidateTabletDevices(MS.Internal.Interop.WindowMessage msg, System.IntPtr wParam, System.IntPtr lParam) (IL=epilog, Native=0x6B3EA58C+0x9D)
PresentationFramework.dll!System.Windows.SystemResources.SystemThemeFilterMessage(System.IntPtr hwnd, int msg, System.IntPtr wParam, System.IntPtr lParam, ref bool handled) (IL≈0x0094, Native=0x6AC6FC60+0x96)
WindowsBase.dll!MS.Win32.HwndWrapper.WndProc(System.IntPtr hwnd, int msg, System.IntPtr wParam, System.IntPtr lParam, ref bool handled) (IL≈0x0030, Native=0x6C9DC1F0+0x9B)
WindowsBase.dll!MS.Win32.HwndSubclass.DispatcherCallbackOperation(object o) (IL≈0x0036, Native=0x6C9DC170+0x6B)
WindowsBase.dll!System.Windows.Threading.ExceptionWrapper.InternalRealCall(System.Delegate callback, object args, int numArgs) (IL≈0x0077, Native=0x6C9DC010+0x52)
WindowsBase.dll!System.Windows.Threading.ExceptionWrapper.TryCatchWhen(object source, System.Delegate callback, object args, int numArgs, System.Delegate catchHandler) (IL≈0x0002, Native=0x6C9DBF70+0x34)
WindowsBase.dll!System.Windows.Threading.Dispatcher.LegacyInvokeImpl(System.Windows.Threading.DispatcherPriority priority, System.TimeSpan timeout, System.Delegate method, object args, int numArgs) (IL≈0x00BB, Native=0x6C9DA450+0x131)
WindowsBase.dll!MS.Win32.HwndSubclass.SubclassWndProc(System.IntPtr hwnd, int msg, System.IntPtr wParam, System.IntPtr lParam) (IL=0x0130, Native=0x6C9DB9C0+0xEE)
WindowsBase.dll!System.Windows.Threading.DispatcherSynchronizationContext.Wait(System.IntPtr[] waitHandles, bool waitAll, int millisecondsTimeout) (IL=epilog, Native=0x6C9DB400+0x23)
mscorlib.dll!System.Threading.SynchronizationContext.InvokeWaitMethodHelper(System.Threading.SynchronizationContext syncContext, System.IntPtr[] waitHandles, bool waitAll, int millisecondsTimeout) (IL=epilog, Native=0x6EC55D30+0x14)
mscorlib.dll!System.Threading.WaitHandle.InternalWaitOne(System.Runtime.InteropServices.SafeHandle waitableSafeHandle, long millisecondsTimeout, bool hasThreadAffinity, bool exitContext) (IL≈0x0014, Native=0x6EC56B10+0x21)
mscorlib.dll!System.Threading.WaitHandle.WaitOne(int millisecondsTimeout, bool exitContext) (IL≈0x0000, Native=0x6EC56AD0+0x28)
mscorlib.dll!System.Threading.WaitHandle.WaitOne() (IL=epilog, Native=0x6EC56AB0+0x12)
PresentationCore.dll!System.Windows.Input.PenThreadWorker.WorkerGetTabletsInfo() (IL≈0x002F, Native=0x6C420C30+0xBE)
PresentationCore.dll!System.Windows.Input.StylusWisp.WispTabletDeviceCollection.UpdateTabletsImpl() (IL=epilog, Native=0x6C439AB8+0x64)
PresentationCore.dll!System.Windows.Input.StylusWisp.WispTabletDeviceCollection.UpdateTablets() (IL=0x0042, Native=0x6C439A24+0x5A)
PresentationCore.dll!System.Windows.Input.StylusWisp.WispTabletDeviceCollection.WispTabletDeviceCollection() (IL≈0x003D, Native=0x6BF31B38+0xC2)
PresentationCore.dll!System.Windows.Input.StylusWisp.WispLogic.WispTabletDevices.get() (IL=0x000E, Native=0x6BF5DF4C+0x20)
PresentationCore.dll!System.Windows.Input.StylusWisp.WispLogic.OnDeviceChange() (IL≈0x000F, Native=0x6C3E9830+0x20)
PresentationCore.dll!System.Windows.Input.StylusWisp.WispLogic.HandleMessage(MS.Internal.Interop.WindowMessage msg, System.IntPtr wParam, System.IntPtr lParam) (IL=0x004C, Native=0x6C3E85C0+0x73)
PresentationFramework.dll!System.Windows.SystemResources.InvalidateTabletDevices(MS.Internal.Interop.WindowMessage msg, System.IntPtr wParam, System.IntPtr lParam) (IL=epilog, Native=0x6B3EA58C+0x9D)
PresentationFramework.dll!System.Windows.SystemResources.SystemThemeFilterMessage(System.IntPtr hwnd, int msg, System.IntPtr wParam, System.IntPtr lParam, ref bool handled) (IL≈0x0094, Native=0x6AC6FC60+0x96)
WindowsBase.dll!MS.Win32.HwndWrapper.WndProc(System.IntPtr hwnd, int msg, System.IntPtr wParam, System.IntPtr lParam, ref bool handled) (IL≈0x0030, Native=0x6C9DC1F0+0x9B)
WindowsBase.dll!MS.Win32.HwndSubclass.DispatcherCallbackOperation(object o) (IL≈0x0036, Native=0x6C9DC170+0x6B)
WindowsBase.dll!System.Windows.Threading.ExceptionWrapper.InternalRealCall(System.Delegate callback, object args, int numArgs) (IL≈0x0077, Native=0x6C9DC010+0x52)
WindowsBase.dll!System.Windows.Threading.ExceptionWrapper.TryCatchWhen(object source, System.Delegate callback, object args, int numArgs, System.Delegate catchHandler) (IL≈0x0002, Native=0x6C9DBF70+0x34)
WindowsBase.dll!System.Windows.Threading.Dispatcher.LegacyInvokeImpl(System.Windows.Threading.DispatcherPriority priority, System.TimeSpan timeout, System.Delegate method, object args, int numArgs) (IL≈0x00BB, Native=0x6C9DA450+0x131)
WindowsBase.dll!MS.Win32.HwndSubclass.SubclassWndProc(System.IntPtr hwnd, int msg, System.IntPtr wParam, System.IntPtr lParam) (IL=0x0130, Native=0x6C9DB9C0+0xEE)
WindowsBase.dll!System.Windows.Threading.DispatcherSynchronizationContext.Wait(System.IntPtr[] waitHandles, bool waitAll, int millisecondsTimeout) (IL=epilog, Native=0x6C9DB400+0x23)
mscorlib.dll!System.Threading.SynchronizationContext.InvokeWaitMethodHelper(System.Threading.SynchronizationContext syncContext, System.IntPtr[] waitHandles, bool waitAll, int millisecondsTimeout) (IL=epilog, Native=0x6EC55D30+0x14)
mscorlib.dll!System.Threading.WaitHandle.InternalWaitOne(System.Runtime.InteropServices.SafeHandle waitableSafeHandle, long millisecondsTimeout, bool hasThreadAffinity, bool exitContext) (IL≈0x0014, Native=0x6EC56B10+0x21)
mscorlib.dll!System.Threading.WaitHandle.WaitOne(int millisecondsTimeout, bool exitContext) (IL≈0x0000, Native=0x6EC56AD0+0x28)
mscorlib.dll!System.Threading.WaitHandle.WaitOne() (IL=epilog, Native=0x6EC56AB0+0x12)
PresentationCore.dll!System.Windows.Input.PenThreadWorker.WorkerGetTabletsInfo() (IL≈0x002F, Native=0x6C420C30+0xBE)
PresentationCore.dll!System.Windows.Input.StylusWisp.WispTabletDeviceCollection.UpdateTabletsImpl() (IL=epilog, Native=0x6C439AB8+0x64)
PresentationCore.dll!System.Windows.Input.StylusWisp.WispTabletDeviceCollection.UpdateTablets() (IL=0x0042, Native=0x6C439A24+0x5A)
PresentationCore.dll!System.Windows.Input.StylusWisp.WispTabletDeviceCollection.WispTabletDeviceCollection() (IL≈0x003D, Native=0x6BF31B38+0xC2)
PresentationCore.dll!System.Windows.Input.StylusWisp.WispLogic.WispTabletDevices.get() (IL=0x000E, Native=0x6BF5DF4C+0x20)
PresentationCore.dll!System.Windows.Input.StylusWisp.WispLogic.OnDeviceChange() (IL≈0x000F, Native=0x6C3E9830+0x20)
PresentationCore.dll!System.Windows.Input.StylusWisp.WispLogic.HandleMessage(MS.Internal.Interop.WindowMessage msg, System.IntPtr wParam, System.IntPtr lParam) (IL=0x004C, Native=0x6C3E85C0+0x73)
PresentationFramework.dll!System.Windows.SystemResources.InvalidateTabletDevices(MS.Internal.Interop.WindowMessage msg, System.IntPtr wParam, System.IntPtr lParam) (IL=epilog, Native=0x6B3EA58C+0x9D)
PresentationFramework.dll!System.Windows.SystemResources.SystemThemeFilterMessage(System.IntPtr hwnd, int msg, System.IntPtr wParam, System.IntPtr lParam, ref bool handled) (IL≈0x0094, Native=0x6AC6FC60+0x96)
WindowsBase.dll!MS.Win32.HwndWrapper.WndProc(System.IntPtr hwnd, int msg, System.IntPtr wParam, System.IntPtr lParam, ref bool handled) (IL≈0x0030, Native=0x6C9DC1F0+0x9B)
WindowsBase.dll!MS.Win32.HwndSubclass.DispatcherCallbackOperation(object o) (IL≈0x0036, Native=0x6C9DC170+0x6B)
WindowsBase.dll!System.Windows.Threading.ExceptionWrapper.InternalRealCall(System.Delegate callback, object args, int numArgs) (IL≈0x0077, Native=0x6C9DC010+0x52)
WindowsBase.dll!System.Windows.Threading.ExceptionWrapper.TryCatchWhen(object source, System.Delegate callback, object args, int numArgs, System.Delegate catchHandler) (IL≈0x0002, Native=0x6C9DBF70+0x34)
WindowsBase.dll!System.Windows.Threading.Dispatcher.LegacyInvokeImpl(System.Windows.Threading.DispatcherPriority priority, System.TimeSpan timeout, System.Delegate method, object args, int numArgs) (IL≈0x00BB, Native=0x6C9DA450+0x131)
WindowsBase.dll!MS.Win32.HwndSubclass.SubclassWndProc(System.IntPtr hwnd, int msg, System.IntPtr wParam, System.IntPtr lParam) (IL=0x0130, Native=0x6C9DB9C0+0xEE)
WindowsBase.dll!System.Windows.Threading.DispatcherSynchronizationContext.Wait(System.IntPtr[] waitHandles, bool waitAll, int millisecondsTimeout) (IL=epilog, Native=0x6C9DB400+0x23)
mscorlib.dll!System.Threading.SynchronizationContext.InvokeWaitMethodHelper(System.Threading.SynchronizationContext syncContext, System.IntPtr[] waitHandles, bool waitAll, int millisecondsTimeout) (IL=epilog, Native=0x6EC55D30+0x14)
mscorlib.dll!System.Threading.WaitHandle.InternalWaitOne(System.Runtime.InteropServices.SafeHandle waitableSafeHandle, long millisecondsTimeout, bool hasThreadAffinity, bool exitContext) (IL≈0x0014, Native=0x6EC56B10+0x21)
mscorlib.dll!System.Threading.WaitHandle.WaitOne(int millisecondsTimeout, bool exitContext) (IL≈0x0000, Native=0x6EC56AD0+0x28)
mscorlib.dll!System.Threading.WaitHandle.WaitOne() (IL=epilog, Native=0x6EC56AB0+0x12)
PresentationCore.dll!System.Windows.Input.PenThreadWorker.WorkerGetTabletsInfo() (IL≈0x002F, Native=0x6C420C30+0xBE)
PresentationCore.dll!System.Windows.Input.StylusWisp.WispTabletDeviceCollection.UpdateTabletsImpl() (IL=epilog, Native=0x6C439AB8+0x64)
PresentationCore.dll!System.Windows.Input.StylusWisp.WispTabletDeviceCollection.UpdateTablets() (IL=0x0042, Native=0x6C439A24+0x5A)
PresentationCore.dll!System.Windows.Input.StylusWisp.WispTabletDeviceCollection.WispTabletDeviceCollection() (IL≈0x003D, Native=0x6BF31B38+0xC2)
PresentationCore.dll!System.Windows.Input.StylusWisp.WispLogic.WispTabletDevices.get() (IL=0x000E, Native=0x6BF5DF4C+0x20)
PresentationCore.dll!System.Windows.Input.StylusWisp.WispLogic.OnDeviceChange() (IL≈0x000F, Native=0x6C3E9830+0x20)
PresentationCore.dll!System.Windows.Input.StylusWisp.WispLogic.HandleMessage(MS.Internal.Interop.WindowMessage msg, System.IntPtr wParam, System.IntPtr lParam) (IL=0x004C, Native=0x6C3E85C0+0x73)
PresentationFramework.dll!System.Windows.SystemResources.InvalidateTabletDevices(MS.Internal.Interop.WindowMessage msg, System.IntPtr wParam, System.IntPtr lParam) (IL=epilog, Native=0x6B3EA58C+0x9D)
PresentationFramework.dll!System.Windows.SystemResources.SystemThemeFilterMessage(System.IntPtr hwnd, int msg, System.IntPtr wParam, System.IntPtr lParam, ref bool handled) (IL≈0x0094, Native=0x6AC6FC60+0x96)
WindowsBase.dll!MS.Win32.HwndWrapper.WndProc(System.IntPtr hwnd, int msg, System.IntPtr wParam, System.IntPtr lParam, ref bool handled) (IL≈0x0030, Native=0x6C9DC1F0+0x9B)
WindowsBase.dll!MS.Win32.HwndSubclass.DispatcherCallbackOperation(object o) (IL≈0x0036, Native=0x6C9DC170+0x6B)
WindowsBase.dll!System.Windows.Threading.ExceptionWrapper.InternalRealCall(System.Delegate callback, object args, int numArgs) (IL≈0x0077, Native=0x6C9DC010+0x52)
WindowsBase.dll!System.Windows.Threading.ExceptionWrapper.TryCatchWhen(object source, System.Delegate callback, object args, int numArgs, System.Delegate catchHandler) (IL≈0x0002, Native=0x6C9DBF70+0x34)
WindowsBase.dll!System.Windows.Threading.Dispatcher.LegacyInvokeImpl(System.Windows.Threading.DispatcherPriority priority, System.TimeSpan timeout, System.Delegate method, object args, int numArgs) (IL≈0x00BB, Native=0x6C9DA450+0x131)
WindowsBase.dll!MS.Win32.HwndSubclass.SubclassWndProc(System.IntPtr hwnd, int msg, System.IntPtr wParam, System.IntPtr lParam) (IL=0x0130, Native=0x6C9DB9C0+0xEE)
WindowsBase.dll!System.Windows.Threading.DispatcherSynchronizationContext.Wait(System.IntPtr[] waitHandles, bool waitAll, int millisecondsTimeout) (IL=epilog, Native=0x6C9DB400+0x23)
mscorlib.dll!System.Threading.SynchronizationContext.InvokeWaitMethodHelper(System.Threading.SynchronizationContext syncContext, System.IntPtr[] waitHandles, bool waitAll, int millisecondsTimeout) (IL=epilog, Native=0x6EC55D30+0x14)
mscorlib.dll!System.Threading.WaitHandle.InternalWaitOne(System.Runtime.InteropServices.SafeHandle waitableSafeHandle, long millisecondsTimeout, bool hasThreadAffinity, bool exitContext) (IL≈0x0014, Native=0x6EC56B10+0x21)
mscorlib.dll!System.Threading.WaitHandle.WaitOne(int millisecondsTimeout, bool exitContext) (IL≈0x0000, Native=0x6EC56AD0+0x28)
mscorlib.dll!System.Threading.WaitHandle.WaitOne() (IL=epilog, Native=0x6EC56AB0+0x12)
PresentationCore.dll!System.Windows.Input.PenThreadWorker.WorkerGetTabletsInfo() (IL≈0x002F, Native=0x6C420C30+0xBE)
PresentationCore.dll!System.Windows.Input.StylusWisp.WispTabletDeviceCollection.UpdateTabletsImpl() (IL=epilog, Native=0x6C439AB8+0x64)
PresentationCore.dll!System.Windows.Input.StylusWisp.WispTabletDeviceCollection.UpdateTablets() (IL=0x0042, Native=0x6C439A24+0x5A)
PresentationCore.dll!System.Windows.Input.StylusWisp.WispTabletDeviceCollection.WispTabletDeviceCollection() (IL≈0x003D, Native=0x6BF31B38+0xC2)
PresentationCore.dll!System.Windows.Input.StylusWisp.WispLogic.WispTabletDevices.get() (IL=0x000E, Native=0x6BF5DF4C+0x20)
PresentationCore.dll!System.Windows.Input.StylusWisp.WispLogic.OnDeviceChange() (IL≈0x000F, Native=0x6C3E9830+0x20)
PresentationCore.dll!System.Windows.Input.StylusWisp.WispLogic.HandleMessage(MS.Internal.Interop.WindowMessage msg, System.IntPtr wParam, System.IntPtr lParam) (IL=0x004C, Native=0x6C3E85C0+0x73)
PresentationFramework.dll!System.Windows.SystemResources.InvalidateTabletDevices(MS.Internal.Interop.WindowMessage msg, System.IntPtr wParam, System.IntPtr lParam) (IL=epilog, Native=0x6B3EA58C+0x9D)
PresentationFramework.dll!System.Windows.SystemResources.SystemThemeFilterMessage(System.IntPtr hwnd, int msg, System.IntPtr wParam, System.IntPtr lParam, ref bool handled) (IL≈0x0094, Native=0x6AC6FC60+0x96)
WindowsBase.dll!MS.Win32.HwndWrapper.WndProc(System.IntPtr hwnd, int msg, System.IntPtr wParam, System.IntPtr lParam, ref bool handled) (IL≈0x0030, Native=0x6C9DC1F0+0x9B)
WindowsBase.dll!MS.Win32.HwndSubclass.DispatcherCallbackOperation(object o) (IL≈0x0036, Native=0x6C9DC170+0x6B)
WindowsBase.dll!System.Windows.Threading.ExceptionWrapper.InternalRealCall(System.Delegate callback, object args, int numArgs) (IL≈0x0077, Native=0x6C9DC010+0x52)
WindowsBase.dll!System.Windows.Threading.ExceptionWrapper.TryCatchWhen(object source, System.Delegate callback, object args, int numArgs, System.Delegate catchHandler) (IL≈0x0002, Native=0x6C9DBF70+0x34)
WindowsBase.dll!System.Windows.Threading.Dispatcher.LegacyInvokeImpl(System.Windows.Threading.DispatcherPriority priority, System.TimeSpan timeout, System.Delegate method, object args, int numArgs) (IL≈0x00BB, Native=0x6C9DA450+0x131)
WindowsBase.dll!MS.Win32.HwndSubclass.SubclassWndProc(System.IntPtr hwnd, int msg, System.IntPtr wParam, System.IntPtr lParam) (IL=0x0130, Native=0x6C9DB9C0+0xEE)
WindowsBase.dll!System.Windows.Threading.DispatcherSynchronizationContext.Wait(System.IntPtr[] waitHandles, bool waitAll, int millisecondsTimeout) (IL=epilog, Native=0x6C9DB400+0x23)
mscorlib.dll!System.Threading.SynchronizationContext.InvokeWaitMethodHelper(System.Threading.SynchronizationContext syncContext, System.IntPtr[] waitHandles, bool waitAll, int millisecondsTimeout) (IL=epilog, Native=0x6EC55D30+0x14)
mscorlib.dll!System.Threading.WaitHandle.InternalWaitOne(System.Runtime.InteropServices.SafeHandle waitableSafeHandle, long millisecondsTimeout, bool hasThreadAffinity, bool exitContext) (IL≈0x0014, Native=0x6EC56B10+0x21)
mscorlib.dll!System.Threading.WaitHandle.WaitOne(int millisecondsTimeout, bool exitContext) (IL≈0x0000, Native=0x6EC56AD0+0x28)
mscorlib.dll!System.Threading.WaitHandle.WaitOne() (IL=epilog, Native=0x6EC56AB0+0x12)
PresentationCore.dll!System.Windows.Input.PenThreadWorker.WorkerGetTabletsInfo() (IL≈0x002F, Native=0x6C420C30+0xBE)
PresentationCore.dll!System.Windows.Input.StylusWisp.WispTabletDeviceCollection.UpdateTabletsImpl() (IL=epilog, Native=0x6C439AB8+0x64)
PresentationCore.dll!System.Windows.Input.StylusWisp.WispTabletDeviceCollection.UpdateTablets() (IL=0x0042, Native=0x6C439A24+0x5A)
PresentationCore.dll!System.Windows.Input.StylusWisp.WispTabletDeviceCollection.WispTabletDeviceCollection() (IL≈0x003D, Native=0x6BF31B38+0xC2)
PresentationCore.dll!System.Windows.Input.StylusWisp.WispLogic.WispTabletDevices.get() (IL=0x000E, Native=0x6BF5DF4C+0x20)
PresentationCore.dll!System.Windows.Input.StylusWisp.WispLogic.OnDeviceChange() (IL≈0x000F, Native=0x6C3E9830+0x20)
PresentationCore.dll!System.Windows.Input.StylusWisp.WispLogic.HandleMessage(MS.Internal.Interop.WindowMessage msg, System.IntPtr wParam, System.IntPtr lParam) (IL=0x004C, Native=0x6C3E85C0+0x73)
PresentationFramework.dll!System.Windows.SystemResources.InvalidateTabletDevices(MS.Internal.Interop.WindowMessage msg, System.IntPtr wParam, System.IntPtr lParam) (IL=epilog, Native=0x6B3EA58C+0x9D)
PresentationFramework.dll!System.Windows.SystemResources.SystemThemeFilterMessage(System.IntPtr hwnd, int msg, System.IntPtr wParam, System.IntPtr lParam, ref bool handled) (IL≈0x0094, Native=0x6AC6FC60+0x96)
WindowsBase.dll!MS.Win32.HwndWrapper.WndProc(System.IntPtr hwnd, int msg, System.IntPtr wParam, System.IntPtr lParam, ref bool handled) (IL≈0x0030, Native=0x6C9DC1F0+0x9B)
WindowsBase.dll!MS.Win32.HwndSubclass.DispatcherCallbackOperation(object o) (IL≈0x0036, Native=0x6C9DC170+0x6B)
WindowsBase.dll!System.Windows.Threading.ExceptionWrapper.InternalRealCall(System.Delegate callback, object args, int numArgs) (IL≈0x0077, Native=0x6C9DC010+0x52)
WindowsBase.dll!System.Windows.Threading.ExceptionWrapper.TryCatchWhen(object source, System.Delegate callback, object args, int numArgs, System.Delegate catchHandler) (IL≈0x0002, Native=0x6C9DBF70+0x34)
WindowsBase.dll!System.Windows.Threading.Dispatcher.LegacyInvokeImpl(System.Windows.Threading.DispatcherPriority priority, System.TimeSpan timeout, System.Delegate method, object args, int numArgs) (IL≈0x00BB, Native=0x6C9DA450+0x131)
WindowsBase.dll!MS.Win32.HwndSubclass.SubclassWndProc(System.IntPtr hwnd, int msg, System.IntPtr wParam, System.IntPtr lParam) (IL=0x0130, Native=0x6C9DB9C0+0xEE)
WindowsBase.dll!System.Windows.Threading.DispatcherSynchronizationContext.Wait(System.IntPtr[] waitHandles, bool waitAll, int millisecondsTimeout) (IL=epilog, Native=0x6C9DB400+0x23)
mscorlib.dll!System.Threading.SynchronizationContext.InvokeWaitMethodHelper(System.Threading.SynchronizationContext syncContext, System.IntPtr[] waitHandles, bool waitAll, int millisecondsTimeout) (IL=epilog, Native=0x6EC55D30+0x14)
mscorlib.dll!System.Threading.WaitHandle.InternalWaitOne(System.Runtime.InteropServices.SafeHandle waitableSafeHandle, long millisecondsTimeout, bool hasThreadAffinity, bool exitContext) (IL≈0x0014, Native=0x6EC56B10+0x21)
mscorlib.dll!System.Threading.WaitHandle.WaitOne(int millisecondsTimeout, bool exitContext) (IL≈0x0000, Native=0x6EC56AD0+0x28)
mscorlib.dll!System.Threading.WaitHandle.WaitOne() (IL=epilog, Native=0x6EC56AB0+0x12)
PresentationCore.dll!System.Windows.Input.PenThreadWorker.WorkerGetTabletsInfo() (IL≈0x002F, Native=0x6C420C30+0xBE)
PresentationCore.dll!System.Windows.Input.StylusWisp.WispTabletDeviceCollection.UpdateTabletsImpl() (IL=epilog, Native=0x6C439AB8+0x64)
PresentationCore.dll!System.Windows.Input.StylusWisp.WispTabletDeviceCollection.UpdateTablets() (IL=0x0042, Native=0x6C439A24+0x5A)
PresentationCore.dll!System.Windows.Input.StylusWisp.WispTabletDeviceCollection.WispTabletDeviceCollection() (IL≈0x003D, Native=0x6BF31B38+0xC2)
PresentationCore.dll!System.Windows.Input.StylusWisp.WispLogic.WispTabletDevices.get() (IL=0x000E, Native=0x6BF5DF4C+0x20)
PresentationCore.dll!System.Windows.Input.StylusWisp.WispLogic.OnDeviceChange() (IL≈0x000F, Native=0x6C3E9830+0x20)
PresentationCore.dll!System.Windows.Input.StylusWisp.WispLogic.HandleMessage(MS.Internal.Interop.WindowMessage msg, System.IntPtr wParam, System.IntPtr lParam) (IL=0x004C, Native=0x6C3E85C0+0x73)
PresentationFramework.dll!System.Windows.SystemResources.InvalidateTabletDevices(MS.Internal.Interop.WindowMessage msg, System.IntPtr wParam, System.IntPtr lParam) (IL=epilog, Native=0x6B3EA58C+0x9D)
PresentationFramework.dll!System.Windows.SystemResources.SystemThemeFilterMessage(System.IntPtr hwnd, int msg, System.IntPtr wParam, System.IntPtr lParam, ref bool handled) (IL≈0x0094, Native=0x6AC6FC60+0x96)
WindowsBase.dll!MS.Win32.HwndWrapper.WndProc(System.IntPtr hwnd, int msg, System.IntPtr wParam, System.IntPtr lParam, ref bool handled) (IL≈0x0030, Native=0x6C9DC1F0+0x9B)
WindowsBase.dll!MS.Win32.HwndSubclass.DispatcherCallbackOperation(object o) (IL≈0x0036, Native=0x6C9DC170+0x6B)
WindowsBase.dll!System.Windows.Threading.ExceptionWrapper.InternalRealCall(System.Delegate callback, object args, int numArgs) (IL≈0x0077, Native=0x6C9DC010+0x52)
WindowsBase.dll!System.Windows.Threading.ExceptionWrapper.TryCatchWhen(object source, System.Delegate callback, object args, int numArgs, System.Delegate catchHandler) (IL≈0x0002, Native=0x6C9DBF70+0x34)
WindowsBase.dll!System.Windows.Threading.Dispatcher.LegacyInvokeImpl(System.Windows.Threading.DispatcherPriority priority, System.TimeSpan timeout, System.Delegate method, object args, int numArgs) (IL≈0x00BB, Native=0x6C9DA450+0x131)
WindowsBase.dll!MS.Win32.HwndSubclass.SubclassWndProc(System.IntPtr hwnd, int msg, System.IntPtr wParam, System.IntPtr lParam) (IL=0x0130, Native=0x6C9DB9C0+0xEE)
WindowsBase.dll!System.Windows.Threading.DispatcherSynchronizationContext.Wait(System.IntPtr[] waitHandles, bool waitAll, int millisecondsTimeout) (IL=epilog, Native=0x6C9DB400+0x23)
mscorlib.dll!System.Threading.SynchronizationContext.InvokeWaitMethodHelper(System.Threading.SynchronizationContext syncContext, System.IntPtr[] waitHandles, bool waitAll, int millisecondsTimeout) (IL=epilog, Native=0x6EC55D30+0x14)
PresentationCore.dll!MS.Win32.Penimc.UnsafeNativeMethods.CreatePimcManager() (IL=0x0022, Native=0x6C422318+0x53)
PresentationCore.dll!MS.Win32.Penimc.UnsafeNativeMethods.UnsafeNativeMethods() (IL=prolog, Native=0x6C422288+0x21)
PresentationCore.dll!System.Windows.Input.PenThreadWorker.PenThreadWorker() (IL≈0x004C, Native=0x6C42080C+0xCB)
PresentationCore.dll!System.Windows.Input.PenThreadPool.GetPenThreadForPenContextHelper(System.Windows.Input.PenContext penContext) (IL≈0x005B, Native=0x6C42067C+0xE5)
PresentationCore.dll!System.Windows.Input.PenThreadPool.GetPenThreadForPenContext(System.Windows.Input.PenContext penContext) (IL=epilog, Native=0x6C4205A8+0x84)
PresentationCore.dll!System.Windows.Input.StylusWisp.WispTabletDeviceCollection.UpdateTabletsImpl() (IL≈0x0009, Native=0x6C439AB8+0x2D)
PresentationCore.dll!System.Windows.Input.StylusWisp.WispTabletDeviceCollection.UpdateTablets() (IL=0x0042, Native=0x6C439A24+0x5A)
PresentationCore.dll!System.Windows.Input.StylusWisp.WispTabletDeviceCollection.WispTabletDeviceCollection() (IL≈0x003D, Native=0x6BF31B38+0xC2)
PresentationCore.dll!System.Windows.Input.StylusWisp.WispLogic.WispTabletDevices.get() (IL=0x000E, Native=0x6BF5DF4C+0x20)
PresentationCore.dll!System.Windows.Input.StylusWisp.WispLogic.RegisterHwndForInput(System.Windows.Input.InputManager inputManager, System.Windows.PresentationSource inputSource) (IL≈0x0032, Native=0x6BF5DD50+0x8F)
PresentationCore.dll!System.Windows.Interop.HwndStylusInputProvider.HwndStylusInputProvider(System.Windows.Interop.HwndSource source) (IL=0x005A, Native=0x6BF5DBCC+0xF8)
PresentationCore.dll!System.Windows.Interop.HwndSource.Initialize(System.Windows.Interop.HwndSourceParameters parameters) (IL=0x0253, Native=0x6BF5C4C8+0x433)
PresentationFramework.dll!System.Windows.Window.CreateSourceWindow(bool duringShow) (IL=0x0082, Native=0x6AC1C0F4+0x1E0)
PresentationFramework.dll!System.Windows.Window.CreateSourceWindowDuringShow() (IL=epilog, Native=0x6ACBB474+0xF)
PresentationFramework.dll!System.Windows.Window.SafeCreateWindowDuringShow() (IL=epilog, Native=0x6AC1D7B4+0x41)
PresentationFramework.dll!System.Windows.Window.ShowHelper(object booleanBox) (IL=0x003B, Native=0x6AC1D644+0x78)
WindowsBase.dll!System.Windows.Threading.ExceptionWrapper.InternalRealCall(System.Delegate callback, object args, int numArgs) (IL≈0x0077, Native=0x6C9DC010+0x52)
WindowsBase.dll!System.Windows.Threading.ExceptionWrapper.TryCatchWhen(object source, System.Delegate callback, object args, int numArgs, System.Delegate catchHandler) (IL≈0x0002, Native=0x6C9DBF70+0x34)
WindowsBase.dll!System.Windows.Threading.DispatcherOperation.InvokeImpl() (IL≈0x007A, Native=0x6C9DE6D0+0xD2)
WindowsBase.dll!System.Windows.Threading.DispatcherOperation.InvokeInSecurityContext(object state) (IL=epilog, Native=0x6C9DE690+0x3C)
mscorlib.dll!System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx) (IL≈0x0079, Native=0x6EC82DC0+0xE5)
mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx) (IL=epilog, Native=0x6EC82DA0+0x16)
mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state) (IL=epilog, Native=0x6EC82D30+0x41)
WindowsBase.dll!MS.Internal.CulturePreservingExecutionContext.Run(MS.Internal.CulturePreservingExecutionContext executionContext, System.Threading.ContextCallback callback, object state) (IL=epilog, Native=0x6C9DE480+0x63)
WindowsBase.dll!System.Windows.Threading.DispatcherOperation.Invoke() (IL=0x0020, Native=0x6C9DE340+0x4E)
WindowsBase.dll!System.Windows.Threading.Dispatcher.ProcessQueue() (IL=0x00F6, Native=0x6C9DA870+0x165)
WindowsBase.dll!System.Windows.Threading.Dispatcher.WndProcHook(System.IntPtr hwnd, int msg, System.IntPtr wParam, System.IntPtr lParam, ref bool handled) (IL=0x0090, Native=0x6C9DAB70+0x5A)
WindowsBase.dll!MS.Win32.HwndWrapper.WndProc(System.IntPtr hwnd, int msg, System.IntPtr wParam, System.IntPtr lParam, ref bool handled) (IL≈0x0030, Native=0x6C9DC1F0+0x9B)
WindowsBase.dll!MS.Win32.HwndSubclass.DispatcherCallbackOperation(object o) (IL≈0x0036, Native=0x6C9DC170+0x6B)
WindowsBase.dll!System.Windows.Threading.ExceptionWrapper.InternalRealCall(System.Delegate callback, object args, int numArgs) (IL≈0x0077, Native=0x6C9DC010+0x52)
WindowsBase.dll!System.Windows.Threading.ExceptionWrapper.TryCatchWhen(object source, System.Delegate callback, object args, int numArgs, System.Delegate catchHandler) (IL≈0x0002, Native=0x6C9DBF70+0x34)
WindowsBase.dll!System.Windows.Threading.Dispatcher.LegacyInvokeImpl(System.Windows.Threading.DispatcherPriority priority, System.TimeSpan timeout, System.Delegate method, object args, int numArgs) (IL≈0x00BB, Native=0x6C9DA450+0x131)
WindowsBase.dll!MS.Win32.HwndSubclass.SubclassWndProc(System.IntPtr hwnd, int msg, System.IntPtr wParam, System.IntPtr lParam) (IL=0x0130, Native=0x6C9DB9C0+0xEE)
[ToNative]
WindowsBase.dll!System.Windows.Threading.Dispatcher.PushFrameImpl(System.Windows.Threading.DispatcherFrame frame) (IL≈0x0040, Native=0x6C9D84CC+0xB1)
WindowsBase.dll!System.Windows.Threading.Dispatcher.PushFrame(System.Windows.Threading.DispatcherFrame frame) (IL=epilog, Native=0x6C9D8124+0x4A)
PresentationFramework.dll!System.Windows.Application.RunDispatcher(object ignore) (IL=0x0024, Native=0x6ABF4E70+0x5A)
PresentationFramework.dll!System.Windows.Application.RunInternal(System.Windows.Window window) (IL=0x00EE, Native=0x6ABF4CEC+0x74)
PresentationFramework.dll!System.Windows.Application.Run(System.Windows.Window window) (IL=epilog, Native=0x6ABF4ADC+0x2B)
PresentationFramework.dll!System.Windows.Application.Run() (IL=epilog, Native=0x6ABF46C8+0x1C)
Lindexi.WPF.exe!Lindexi.Program.Initialize() (IL≈0x000E, Native=0x0592A0A0+0x54)
Lindexi.WPF.exe!Lindexi.Program.Main(string[] args) (IL=0x001C, Native=0x00DF0448+0x42)
```

The Stylus Input thread callstack

```
> PresentationCore.dll!System.Windows.Input.PenThreadWorker.ThreadProc() (IL≈0x00AF, Native=0x6C421E44+0x176)
mscorlib.dll!System.Threading.ThreadHelper.ThreadStart_Context(object state) (IL=epilog, Native=0x6EC56060+0x9D)
mscorlib.dll!System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx) (IL≈0x0079, Native=0x6EC82DC0+0xE5)
mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx) (IL=epilog, Native=0x6EC82DA0+0x16)
mscorlib.dll!System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state) (IL=epilog, Native=0x6EC82D30+0x41)
mscorlib.dll!System.Threading.ThreadHelper.ThreadStart() (IL=epilog, Native=0x6EC56014+0x44)
```

**Expected behavior:**

The main thread will not wait for the Stylus Input thread all the time

**Minimal repro:**

The empty WPF application and set the WPF application starts automatically at boot. After the device is started, the touch screen HID device will be connected.

I tested it hundreds of times and it appeared once. This seems to be part of the WPF touch thread processing problem.

Related issues:

https://github.com/dotnet/wpf/issues/78

https://github.com/dotnet/wpf/issues/928

https://github.com/Microsoft/dotnet/issues/480

https://github.com/dotnet/wpf/issues/2054

Contributor guide

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