AvalonDock
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Published
20 hours ago •
Dirkster99
Dirkster99
Regression causing taskbar application icon to flicker often
Hi Dirk,
Hope all is well at your end!
We were chasing that anoying problem in our application. It happens quite often that application icon in taskbar flicker many times and what is more anoying application loses focus which causes menus or popups to get closed without a reason.
We traced down that to a change made in 96c6c89 and more precisely in source\Components\AvalonDock\Controls\Shell\SystemParameters2.cs.
The change causes that singleton Current is not initialized only once but each time it is referenced which in turn creates MessageWindow each time and that provokes the flickering and focus lost. I am not sure that change is made by purpose or wrong type of optimization but the old code works better for us.
If you are OK to revert that change I can create pull request.
Best regards,
Boris.
We're also seeing this with ILSpy: there's a whole bunch of MessageWindow instances getting created during startup.
These windows are visible in the taskbar (as flicking underlines without icon):
Stack trace of first MessageWindow creation
# Child-SP RetAddr Call Site
00 0000002f`5bffb828 00007ff8`a361117e USER32!CreateWindowExW
01 0000002f`5bffb830 00007ff8`a3611013 0x00007ff8`a361117e
02 0000002f`5bffb950 00007ff8`a360ff5f AvalonDock!Standard.NativeMethods.CreateWindowEx+0x73
03 0000002f`5bffb9d0 00007ff8`a360e8f2 AvalonDock!Standard.MessageWindow..ctor+0x27f
04 0000002f`5bffbb60 00007ff8`a360e089 AvalonDock!Microsoft.Windows.Shell.SystemParameters2..ctor+0x132
05 0000002f`5bffbcb0 00007ff8`f0cb4e3d AvalonDock!Microsoft.Windows.Shell.WindowChrome..ctor+0x109
06 0000002f`5bffbd40 00007ff8`f0cca91d System_Private_CoreLib!System.RuntimeType.CreateInstanceDefaultCtor+0xbd [/_/src/coreclr/System.Private.CoreLib/src/System/RuntimeType.CoreCLR.cs @ 3753]
07 0000002f`5bffbda0 00007ff8`f0cb4c30 System_Private_CoreLib!System.Activator.CreateInstance+0x3d [/_/src/libraries/System.Private.CoreLib/src/System/Activator.RuntimeType.cs @ 100]
08 0000002f`5bffbde0 00007ff8`f0cca6c5 System_Private_CoreLib!System.RuntimeType.CreateInstanceImpl+0x360 [/_/src/coreclr/System.Private.CoreLib/src/System/RuntimeType.CoreCLR.cs @ 3704]
09 0000002f`5bffbea0 00007ff8`f0cca482 System_Private_CoreLib!System.Activator.CreateInstance+0x85 [/_/src/libraries/System.Private.CoreLib/src/System/Activator.RuntimeType.cs @ 38]
0a 0000002f`5bffbf00 00007ff8`f2405fb0 System_Private_CoreLib!System.Activator.CreateInstance+0x22 [/_/src/libraries/System.Private.CoreLib/src/System/Activator.cs @ 31]
0b 0000002f`5bffbf40 00007ff8`f240acf0 System_Xaml!System.Xaml.Schema.SafeReflectionInvoker.CreateInstanceCritical+0x20 [/_/src/Microsoft.DotNet.Wpf/src/System.Xaml/System/Xaml/Schema/SafeReflectionInvoker.cs @ 189]
0c 0000002f`5bffbf70 00007ff8`f2412d48 System_Xaml!System.Xaml.Schema.XamlTypeInvoker.CreateInstance+0x80 [/_/src/Microsoft.DotNet.Wpf/src/System.Xaml/System/Xaml/Schema/XamlTypeInvoker.cs @ 141]
0d 0000002f`5bffbfb0 00007ff8`f2412bcc System_Xaml!MS.Internal.Xaml.Runtime.ClrObjectRuntime.CreateInstanceWithCtor+0x28 [/_/src/Microsoft.DotNet.Wpf/src/System.Xaml/System/Xaml/Runtime/ClrObjectRuntime.cs @ 69]
0e 0000002f`5bffbfe0 00007ff8`f23de1dc System_Xaml!MS.Internal.Xaml.Runtime.ClrObjectRuntime.CreateInstance+0x5c [/_/src/Microsoft.DotNet.Wpf/src/System.Xaml/System/Xaml/Runtime/ClrObjectRuntime.cs @ 51]
0f 0000002f`5bffc030 00007ff8`f23dca82 System_Xaml!System.Xaml.XamlObjectWriter.Logic_CreateAndAssignToParentStart+0x21c [/_/src/Microsoft.DotNet.Wpf/src/System.Xaml/System/Xaml/InfosetObjects/XamlObjectWriter.cs @ 1167]
10 0000002f`5bffc0b0 00007ff8`f23f7bdc System_Xaml!System.Xaml.XamlObjectWriter.WriteStartMember+0x322 [/_/src/Microsoft.DotNet.Wpf/src/System.Xaml/System/Xaml/InfosetObjects/XamlObjectWriter.cs @ 639]
11 0000002f`5bffc100 00007ff8`dbc63f6d System_Xaml!System.Xaml.XamlWriter.WriteNode+0xec [/_/src/Microsoft.DotNet.Wpf/src/System.Xaml/System/Xaml/XamlWriter.cs @ 46]
12 0000002f`5bffc140 00007ff8`dbc639e2 PresentationFramework!System.Windows.Markup.WpfXamlLoader.TransformNodes+0x4cd [/_/src/Microsoft.DotNet.Wpf/src/PresentationFramework/System/Windows/Markup/WpfXamlLoader.cs @ 247]
13 0000002f`5bffc280 00007ff8`dbb107a4 PresentationFramework!System.Windows.Markup.WpfXamlLoader.Load+0x1f2 [/_/src/Microsoft.DotNet.Wpf/src/PresentationFramework/System/Windows/Markup/WpfXamlLoader.cs @ 148]
14 0000002f`5bffc340 00007ff8`dbb0fd67 PresentationFramework!System.Windows.ResourceDictionary.CreateObject+0x94 [/_/src/Microsoft.DotNet.Wpf/src/PresentationFramework/System/Windows/ResourceDictionary.cs @ 1385]
15 0000002f`5bffc3a0 00007ff8`dbb0fc1d PresentationFramework!System.Windows.ResourceDictionary.OnGettingValue+0xc7 [/_/src/Microsoft.DotNet.Wpf/src/PresentationFramework/System/Windows/ResourceDictionary.cs @ 1035]
16 0000002f`5bffc3f0 00007ff8`dbb0efcf PresentationFramework!System.Windows.ResourceDictionary.OnGettingValuePrivate+0x5d [/_/src/Microsoft.DotNet.Wpf/src/PresentationFramework/System/Windows/ResourceDictionary.cs @ 997]
17 0000002f`5bffc440 00007ff8`dbb0ef0e PresentationFramework!System.Windows.ResourceDictionary.GetValueWithoutLock+0x4f [/_/src/Microsoft.DotNet.Wpf/src/PresentationFramework/System/Windows/ResourceDictionary.cs @ 508]
18 0000002f`5bffc490 00007ff8`dbf10f04 PresentationFramework!System.Windows.ResourceDictionary.GetValue+0x5e [/_/src/Microsoft.DotNet.Wpf/src/PresentationFramework/System/Windows/ResourceDictionary.cs @ 492]
19 0000002f`5bffc4f0 00007ff8`dbf10e76 PresentationFramework!System.Windows.ResourceDictionary.ResourceDictionaryEnumerator.System.Collections.IDictionaryEnumerator.get_Entry+0x44 [/_/src/Microsoft.DotNet.Wpf/src/PresentationFramework/System/Windows/ResourceDictionary.cs @ 2105]
1a 0000002f`5bffc550 00007ff8`a35f6972 PresentationFramework!System.Windows.ResourceDictionary.ResourceDictionaryEnumerator.System.Collections.IEnumerator.get_Current+0x26 [/_/src/Microsoft.DotNet.Wpf/src/PresentationFramework/System/Windows/ResourceDictionary.cs @ 2082]
1b 0000002f`5bffc590 00007ff8`a35f6ab3 ILSpy!ICSharpCode.ILSpy.Themes.ThemeManager.<UpdateTheme>g__ProcessDictionary|16_0+0x92 [C:\work\ILSpy\ILSpy\Themes\ThemeManager.cs @ 113]
1c 0000002f`5bffc660 00007ff8`a35f6ab3 ILSpy!ICSharpCode.ILSpy.Themes.ThemeManager.<UpdateTheme>g__ProcessDictionary|16_0+0x1d3 [C:\work\ILSpy\ILSpy\Themes\ThemeManager.cs @ 120]
1d 0000002f`5bffc730 00007ff8`a35f6ab3 ILSpy!ICSharpCode.ILSpy.Themes.ThemeManager.<UpdateTheme>g__ProcessDictionary|16_0+0x1d3 [C:\work\ILSpy\ILSpy\Themes\ThemeManager.cs @ 120]
1e 0000002f`5bffc800 00007ff8`a35f6ab3 ILSpy!ICSharpCode.ILSpy.Themes.ThemeManager.<UpdateTheme>g__ProcessDictionary|16_0+0x1d3 [C:\work\ILSpy\ILSpy\Themes\ThemeManager.cs @ 120]
1f 0000002f`5bffc8d0 00007ff8`a35f2c33 ILSpy!ICSharpCode.ILSpy.Themes.ThemeManager.<UpdateTheme>g__ProcessDictionary|16_0+0x1d3 [C:\work\ILSpy\ILSpy\Themes\ThemeManager.cs @ 120]
20 0000002f`5bffc9a0 00007ff8`a35f29ad ILSpy!ICSharpCode.ILSpy.Themes.ThemeManager.UpdateTheme+0x263 [C:\work\ILSpy\ILSpy\Themes\ThemeManager.cs @ 109]
21 0000002f`5bffca60 00007ff8`a35f2949 ILSpy!ICSharpCode.ILSpy.Themes.ThemeManager.set_Theme+0x2d [C:\work\ILSpy\ILSpy\Themes\ThemeManager.cs @ 58]
22 0000002f`5bffca90 00007ff8`a35ebdc7 ILSpy!ICSharpCode.ILSpy.SessionSettings.set_Theme+0x39 [C:\work\ILSpy\ILSpy\SessionSettings.cs @ 87]
23 0000002f`5bffcac0 00007ff8`a35ea8bb ILSpy!ICSharpCode.ILSpy.SessionSettings..ctor+0x867 [C:\work\ILSpy\ILSpy\SessionSettings.cs @ 67]
24 0000002f`5bffce30 00007ff8`f0cb4e3d ILSpy!ICSharpCode.ILSpy.MainWindow..ctor+0x11b [C:\work\ILSpy\ILSpy\MainWindow.xaml.cs @ 120]
25 0000002f`5bffcfa0 00007ff8`f0cca91d System_Private_CoreLib!System.RuntimeType.CreateInstanceDefaultCtor+0xbd [/_/src/coreclr/System.Private.CoreLib/src/System/RuntimeType.CoreCLR.cs @ 3753]
26 0000002f`5bffd000 00007ff8`f0cb4c30 System_Private_CoreLib!System.Activator.CreateInstance+0x3d [/_/src/libraries/System.Private.CoreLib/src/System/Activator.RuntimeType.cs @ 100]
27 0000002f`5bffd040 00007ff8`f0cca6c5 System_Private_CoreLib!System.RuntimeType.CreateInstanceImpl+0x360 [/_/src/coreclr/System.Private.CoreLib/src/System/RuntimeType.CoreCLR.cs @ 3704]
28 0000002f`5bffd100 00007ff8`f0cca482 System_Private_CoreLib!System.Activator.CreateInstance+0x85 [/_/src/libraries/System.Private.CoreLib/src/System/Activator.RuntimeType.cs @ 38]
29 0000002f`5bffd160 00007ff8`f2405fb0 System_Private_CoreLib!System.Activator.CreateInstance+0x22 [/_/src/libraries/System.Private.CoreLib/src/System/Activator.cs @ 31]
2a 0000002f`5bffd1a0 00007ff8`f240acf0 System_Xaml!System.Xaml.Schema.SafeReflectionInvoker.CreateInstanceCritical+0x20 [/_/src/Microsoft.DotNet.Wpf/src/System.Xaml/System/Xaml/Schema/SafeReflectionInvoker.cs @ 189]
2b 0000002f`5bffd1d0 00007ff8`f2412d48 System_Xaml!System.Xaml.Schema.XamlTypeInvoker.CreateInstance+0x80 [/_/src/Microsoft.DotNet.Wpf/src/System.Xaml/System/Xaml/Schema/XamlTypeInvoker.cs @ 141]
2c 0000002f`5bffd210 00007ff8`f2412bcc System_Xaml!MS.Internal.Xaml.Runtime.ClrObjectRuntime.CreateInstanceWithCtor+0x28 [/_/src/Microsoft.DotNet.Wpf/src/System.Xaml/System/Xaml/Runtime/ClrObjectRuntime.cs @ 69]
2d 0000002f`5bffd240 00007ff8`f23de1dc System_Xaml!MS.Internal.Xaml.Runtime.ClrObjectRuntime.CreateInstance+0x5c [/_/src/Microsoft.DotNet.Wpf/src/System.Xaml/System/Xaml/Runtime/ClrObjectRuntime.cs @ 51]
2e 0000002f`5bffd290 00007ff8`f23dca82 System_Xaml!System.Xaml.XamlObjectWriter.Logic_CreateAndAssignToParentStart+0x21c [/_/src/Microsoft.DotNet.Wpf/src/System.Xaml/System/Xaml/InfosetObjects/XamlObjectWriter.cs @ 1167]
2f 0000002f`5bffd310 00007ff8`f23f7bdc System_Xaml!System.Xaml.XamlObjectWriter.WriteStartMember+0x322 [/_/src/Microsoft.DotNet.Wpf/src/System.Xaml/System/Xaml/InfosetObjects/XamlObjectWriter.cs @ 639]
30 0000002f`5bffd360 00007ff8`dbc63f6d System_Xaml!System.Xaml.XamlWriter.WriteNode+0xec [/_/src/Microsoft.DotNet.Wpf/src/System.Xaml/System/Xaml/XamlWriter.cs @ 46]
31 0000002f`5bffd3a0 00007ff8`dbc639e2 PresentationFramework!System.Windows.Markup.WpfXamlLoader.TransformNodes+0x4cd [/_/src/Microsoft.DotNet.Wpf/src/PresentationFramework/System/Windows/Markup/WpfXamlLoader.cs @ 247]
32 0000002f`5bffd4e0 00007ff8`dbc6373f PresentationFramework!System.Windows.Markup.WpfXamlLoader.Load+0x1f2 [/_/src/Microsoft.DotNet.Wpf/src/PresentationFramework/System/Windows/Markup/WpfXamlLoader.cs @ 148]
33 0000002f`5bffd5a0 00007ff8`dbc69ce8 PresentationFramework!System.Windows.Markup.WpfXamlLoader.LoadBaml+0x7f [/_/src/Microsoft.DotNet.Wpf/src/PresentationFramework/System/Windows/Markup/WpfXamlLoader.cs @ 43]
34 0000002f`5bffd600 00007ff8`dbadf94c PresentationFramework!System.Windows.Markup.XamlReader.LoadBaml+0x2b8 [/_/src/Microsoft.DotNet.Wpf/src/PresentationFramework/System/Windows/Markup/XamlReader.cs @ 1115]
35 0000002f`5bffd680 00007ff8`dbadf7d8 PresentationFramework!System.Windows.Application.LoadBamlStreamWithSyncInfo+0xbc [/_/src/Microsoft.DotNet.Wpf/src/PresentationFramework/System/Windows/Application.cs @ 575]
36 0000002f`5bffd6f0 00007ff8`dbae19e4 PresentationFramework!System.Windows.Application.LoadComponent+0xc8 [/_/src/Microsoft.DotNet.Wpf/src/PresentationFramework/System/Windows/Application.cs @ 531]
37 0000002f`5bffd740 00007ff8`dbae3866 PresentationFramework!System.Windows.Application.DoStartup+0x134 [/_/src/Microsoft.DotNet.Wpf/src/PresentationFramework/System/Windows/Application.cs @ 1524]
38 0000002f`5bffd7a0 00007ff8`f26b73ad PresentationFramework!System.Windows.Application.<.ctor>b__1_0+0x76 [/_/src/Microsoft.DotNet.Wpf/src/PresentationFramework/System/Windows/Application.cs @ 170]
39 0000002f`5bffd7e0 00007ff8`f26b7242 WindowsBase!System.Windows.Threading.ExceptionWrapper.InternalRealCall+0xcd [/_/src/Microsoft.DotNet.Wpf/src/WindowsBase/MS/Internal/Threading/ExceptionWrapper.cs @ 103]
3a 0000002f`5bffd840 00007ff8`f26bdcae WindowsBase!System.Windows.Threading.ExceptionWrapper.TryCatchWhen+0x32 [/_/src/Microsoft.DotNet.Wpf/src/WindowsBase/MS/Internal/Threading/ExceptionWrapper.cs @ 36]
3b 0000002f`5bffd890 00007ff8`f26bdb82 WindowsBase!System.Windows.Threading.DispatcherOperation.InvokeImpl+0x11e [/_/src/Microsoft.DotNet.Wpf/src/WindowsBase/System/Windows/Threading/DispatcherOperation.cs @ 540]
3c 0000002f`5bffd910 00007ff8`f265b687 WindowsBase!System.Windows.Threading.DispatcherOperation.InvokeInSecurityContext+0x22 [/_/src/Microsoft.DotNet.Wpf/src/WindowsBase/System/Windows/Threading/DispatcherOperation.cs @ 489]
3d 0000002f`5bffd940 00007ff8`f0dad699 WindowsBase!MS.Internal.CulturePreservingExecutionContext.CallbackWrapper+0x37 [/_/src/Microsoft.DotNet.Wpf/src/Shared/MS/Internal/CulturePreservingExecutionContext.cs @ 215]
3e 0000002f`5bffd980 00007ff8`f0dad61f System_Private_CoreLib!System.Threading.ExecutionContext.RunInternal+0x69 [/_/src/libraries/System.Private.CoreLib/src/System/Threading/ExecutionContext.cs @ 183]
3f 0000002f`5bffd9f0 00007ff8`f265b5d3 System_Private_CoreLib!System.Threading.ExecutionContext.Run+0xf [/_/src/libraries/System.Private.CoreLib/src/System/Threading/ExecutionContext.cs @ 148]
40 0000002f`5bffda20 00007ff8`f26bd9d2 WindowsBase!MS.Internal.CulturePreservingExecutionContext.Run+0xf3 [/_/src/Microsoft.DotNet.Wpf/src/Shared/MS/Internal/CulturePreservingExecutionContext.cs @ 172]
41 0000002f`5bffda70 00007ff8`f26ba805 WindowsBase!System.Windows.Threading.DispatcherOperation.Invoke+0x42 [/_/src/Microsoft.DotNet.Wpf/src/WindowsBase/System/Windows/Threading/DispatcherOperation.cs @ 412]
42 0000002f`5bffdad0 00007ff8`f26bad2a WindowsBase!System.Windows.Threading.Dispatcher.ProcessQueue+0x265 [/_/src/Microsoft.DotNet.Wpf/src/WindowsBase/System/Windows/Threading/Dispatcher.cs @ 2087]
43 0000002f`5bffdb70 00007ff8`f2650667 WindowsBase!System.Windows.Threading.Dispatcher.WndProcHook+0x8a [/_/src/Microsoft.DotNet.Wpf/src/WindowsBase/System/Windows/Threading/Dispatcher.cs @ 2296]
44 0000002f`5bffdc10 00007ff8`f264f809 WindowsBase!MS.Win32.HwndWrapper.WndProc+0xa7 [/_/src/Microsoft.DotNet.Wpf/src/Shared/MS/Win32/HwndWrapper.cs @ 295]
45 0000002f`5bffdca0 00007ff8`f26b73ad WindowsBase!MS.Win32.HwndSubclass.DispatcherCallbackOperation+0x79 [/_/src/Microsoft.DotNet.Wpf/src/Shared/MS/Win32/HwndSubclass.cs @ 429]
46 0000002f`5bffdcf0 00007ff8`f26b7242 WindowsBase!System.Windows.Threading.ExceptionWrapper.InternalRealCall+0xcd [/_/src/Microsoft.DotNet.Wpf/src/WindowsBase/MS/Internal/Threading/ExceptionWrapper.cs @ 103]
47 0000002f`5bffdd50 00007ff8`f26b935e WindowsBase!System.Windows.Threading.ExceptionWrapper.TryCatchWhen+0x32 [/_/src/Microsoft.DotNet.Wpf/src/WindowsBase/MS/Internal/Threading/ExceptionWrapper.cs @ 36]
48 0000002f`5bffdda0 00007ff8`f264f5ab WindowsBase!System.Windows.Threading.Dispatcher.LegacyInvokeImpl+0x17e [/_/src/Microsoft.DotNet.Wpf/src/WindowsBase/System/Windows/Threading/Dispatcher.cs @ 1329]
49 0000002f`5bffde40 00007ff8`a28732e0 WindowsBase!MS.Win32.HwndSubclass.SubclassWndProc+0x21b [/_/src/Microsoft.DotNet.Wpf/src/Shared/MS/Win32/HwndSubclass.cs @ 341]
4a 0000002f`5bffdf80 00007ff9`5ba4e7e8 0x00007ff8`a28732e0
4b 0000002f`5bffe000 00007ff9`5ba4e229 USER32!UserCallWinProcCheckWow+0x2f8
4c 0000002f`5bffe190 00007ff8`a35e88cb USER32!DispatchMessageWorker+0x249
4d 0000002f`5bffe210 00007ff8`f26ba9ef 0x00007ff8`a35e88cb
4e 0000002f`5bffe2d0 00007ff8`f26b8362 WindowsBase!System.Windows.Threading.Dispatcher.PushFrameImpl+0xbf [/_/src/Microsoft.DotNet.Wpf/src/WindowsBase/System/Windows/Threading/Dispatcher.cs @ 2135]
4f 0000002f`5bffe360 00007ff8`f26b830e WindowsBase!System.Windows.Threading.Dispatcher.PushFrame+0x42 [/_/src/Microsoft.DotNet.Wpf/src/WindowsBase/System/Windows/Threading/Dispatcher.cs @ 329]
50 0000002f`5bffe3a0 00007ff8`dbae37ad WindowsBase!System.Windows.Threading.Dispatcher.Run+0x3e [/_/src/Microsoft.DotNet.Wpf/src/WindowsBase/System/Windows/Threading/Dispatcher.cs @ 297]
51 0000002f`5bffe3d0 00007ff8`dbae1e64 PresentationFramework!System.Windows.Application.RunDispatcher+0x1d [/_/src/Microsoft.DotNet.Wpf/src/PresentationFramework/System/Windows/Application.cs @ 2405]
52 0000002f`5bffe410 00007ff8`dbadef2c PresentationFramework!System.Windows.Application.RunInternal+0x154 [/_/src/Microsoft.DotNet.Wpf/src/PresentationFramework/System/Windows/Application.cs @ 1695]
53 0000002f`5bffe470 00007ff8`a2852ace PresentationFramework!System.Windows.Application.Run+0x2c [/_/src/Microsoft.DotNet.Wpf/src/PresentationFramework/System/Windows/Application.cs @ 198]
54 0000002f`5bffe4a0 00007ff9`023faed3 ILSpy!ICSharpCode.ILSpy.App.Main+0x5e
55 0000002f`5bffe4f0 00007ff9`023183b6 coreclr!CallDescrWorkerInternal+0x83
56 0000002f`5bffe530 00007ff9`0239f407 coreclr!MethodDescCallSite::CallTargetWorker+0x176 [D:\a\_work\1\s\src\coreclr\vm\callhelpers.cpp @ 551]
57 (Inline Function) --------`-------- coreclr!MethodDescCallSite::Call+0xb [D:\a\_work\1\s\src\coreclr\vm\callhelpers.h @ 458]
58 0000002f`5bffe660 00007ff9`0239f286 coreclr!RunMainInternal+0x11f [D:\a\_work\1\s\src\coreclr\vm\assembly.cpp @ 1483]
59 0000002f`5bffe790 00007ff9`0239f135 coreclr!RunMain+0xd2 [D:\a\_work\1\s\src\coreclr\vm\assembly.cpp @ 1554]
5a 0000002f`5bffe840 00007ff9`0239eef6 coreclr!Assembly::ExecuteMainMethod+0x1c9 [D:\a\_work\1\s\src\coreclr\vm\assembly.cpp @ 1672]
5b 0000002f`5bffebd0 00007ff9`023b61e2 coreclr!CorHost2::ExecuteAssembly+0x1c6 [D:\a\_work\1\s\src\coreclr\vm\corhost.cpp @ 384]
5c 0000002f`5bffed40 00007ff9`1282971b coreclr!coreclr_execute_assembly+0xe2 [D:\a\_work\1\s\src\coreclr\dlls\mscoree\unixinterface.cpp @ 475]
5d (Inline Function) --------`-------- hostpolicy!coreclr_t::execute_assembly+0x2a [D:\a\_work\1\s\src\native\corehost\hostpolicy\coreclr.cpp @ 89]
5e 0000002f`5bffede0 00007ff9`12829a4c hostpolicy!run_app_for_context+0x56b [D:\a\_work\1\s\src\native\corehost\hostpolicy\hostpolicy.cpp @ 255]
5f 0000002f`5bffef80 00007ff9`1282a3e7 hostpolicy!run_app+0x3c [D:\a\_work\1\s\src\native\corehost\hostpolicy\hostpolicy.cpp @ 284]
60 0000002f`5bffefc0 00007ff9`23ddb7e0 hostpolicy!corehost_main+0x107 [D:\a\_work\1\s\src\native\corehost\hostpolicy\hostpolicy.cpp @ 430]
61 0000002f`5bfff170 00007ff9`23dde41a hostfxr!execute_app+0x330 [D:\a\_work\1\s\src\native\corehost\fxr\fx_muxer.cpp @ 146]
62 0000002f`5bfff270 00007ff9`23de06e6 hostfxr!`anonymous namespace'::read_config_and_execute+0xaa [D:\a\_work\1\s\src\native\corehost\fxr\fx_muxer.cpp @ 533]
63 0000002f`5bfff370 00007ff9`23ddea84 hostfxr!fx_muxer_t::handle_exec_host_command+0x166 [D:\a\_work\1\s\src\native\corehost\fxr\fx_muxer.cpp @ 1018]
64 0000002f`5bfff420 00007ff9`23dd85a3 hostfxr!fx_muxer_t::execute+0x494 [D:\a\_work\1\s\src\native\corehost\fxr\fx_muxer.cpp @ 579]
65 0000002f`5bfff560 00007ff6`18cc24b8 hostfxr!hostfxr_main_startupinfo+0xb3 [D:\a\_work\1\s\src\native\corehost\fxr\hostfxr.cpp @ 61]
66 0000002f`5bfff660 00007ff6`18cc282b apphost!exe_start+0x8d8 [D:\a\_work\1\s\src\native\corehost\corehost.cpp @ 235]
67 0000002f`5bfff830 00007ff6`18cc3cd8 apphost!wmain+0xab [D:\a\_work\1\s\src\native\corehost\corehost.cpp @ 304]
68 (Inline Function) --------`-------- apphost!invoke_main+0x22 [d:\a01\_work\12\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl @ 90]
69 0000002f`5bfff860 00007ff9`5bd87614 apphost!__scrt_common_main_seh+0x10c [d:\a01\_work\12\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl @ 288]
6a 0000002f`5bfff8a0 00007ff9`5c0426a1 KERNEL32!BaseThreadInitThunk+0x14
6b 0000002f`5bfff8d0 00000000`00000000 ntdll!RtlUserThreadStart+0x21
I'm not sure if multiple MessageWindow instances are necessary, but even if they are, I don't think they should be visible and focus-stealing. Normally invisible windows are used for similar purposes.
Looking at the SystemParameters2.cs code using this window, I guess it may need to be visible after all.
But I think even if the window itself is visible, it doesn't need to steal focus or appear on the taskbar.
I think WS_EX_NOACTIVATE could help with the taskbar issue; and the ShowWindow call could use SW_SHOWNOACTIVATE instead of SW_SHOW to avoid stealing the focus.