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EntryPointNotFoundException: Unable to find an entry point named 'GetDpiForMonitor' in DLL 'shcore.dll'. #7284

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telikey opened this issue Dec 30, 2021 · 3 comments · Fixed by #15734
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EntryPointNotFoundException: Unable to find an entry point named 'GetDpiForMonitor' in DLL 'shcore.dll'. #7284

telikey opened this issue Dec 30, 2021 · 3 comments · Fixed by #15734
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bug help-wanted os-windows

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@telikey
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telikey commented Dec 30, 2021 •
edited

Describe the bug
Description: The process was terminated due to an unhandled exception.
Exception Info: System.EntryPointNotFoundException: Unable to find an entry point named 'GetDpiForMonitor' in DLL 'shcore.dll'.
StackStrace:
at Avalonia.Win32.Interop.UnmanagedMethods.GetDpiForMonitor(IntPtr hmonitor, MONITOR_DPI_TYPE dpiType, UInt32& dpiX, UInt32& dpiY)
at Avalonia.Win32.WindowImpl.CreateWindow() in //src/Windows/Avalonia.Win32/WindowImpl.cs:line 773
at Avalonia.Win32.WindowImpl..ctor() in //src/Windows/Avalonia.Win32/WindowImpl.cs:line 123
at Avalonia.Win32.Win32Platform.CreateWindow() in //src/Windows/Avalonia.Win32/Win32Platform.cs:line 316
at Avalonia.Controls.Platform.PlatformManager.CreateWindow() in //src/Avalonia.Controls/Platform/PlatformManager.cs:line 48
at Avalonia.Controls.Window..ctor() in //src/Avalonia.Controls/Window.cs:line 231
at Avalonia.ReactiveUI.ReactiveWindow'1..ctor() in //src/Avalonia.ReactiveUI/ReactiveWindow.cs:line 26
at Client_App.Views.MainWindow..ctor() in C:\Users\Admin\Desktop\RAO_Project\Client_App\Views\MainWindow.axaml.cs:line 34
at Client_App.App.OnFrameworkInitializationCompleted() in C:\Users\Admin\Desktop\RAO_Project\Client_App\App.axaml.cs:line 19
at Avalonia.Controls.AppBuilderBase'1.Setup() in //src/Avalonia.Controls/AppBuilderBase.cs:line 312
at Avalonia.Controls.AppBuilderBase'1.SetupWithLifetime(IApplicationLifetime lifetime) in //src/Avalonia.Controls/AppBuilderBase.cs:line 179
at Avalonia.ClassicDesktopStyleApplicationLifetimeExtensions.StartWithClassicDesktopLifetime[T](T builder, String[] args, ShutdownMode shutdownMode) in /_/src/Avalonia.Controls/ApplicationLifetimes/ClassicDesktopStyleApplicationLifetime.cs:line 174

Desktop (please complete the following information):

  • OS: Windows 8
  • Version 6.2.9200
  • Build 9200

Additional context
Updated Avalonia 0.10.10 from 0.10.0
@telikey telikey added the bug label Dec 30, 2021
@Symbai
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Symbai commented Dec 30, 2021

GetDpiForMonitor requires Windows 8.1 or later. I couldn't find any system requirements for Avalonia but Windows 8(.0) is pretty much out of support anywhere. If you don't want to run into more issue you should consider upgrading.

@kekekeks
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CreateWindow does check the windows version to be >8.0:

Avalonia/src/Windows/Avalonia.Win32/WindowImpl.cs

Line 774 in 28a2a2f

if (ShCoreAvailable && Win32Platform.WindowsVersion > PlatformConstants.Windows8)

The same check is done in

Avalonia/src/Windows/Avalonia.Win32/FramebufferManager.cs

Line 90 in a77b8aa

if (UnmanagedMethods.ShCoreAvailable && Win32Platform.WindowsVersion > PlatformConstants.Windows8)

ScreenImpl, however, checks using GetProcAddress:

Avalonia/src/Windows/Avalonia.Win32/ScreenImpl.cs

Line 34 in 7842883

var method = GetProcAddress(shcore, nameof(GetDpiForMonitor));

@stepangovorko
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There is an issue with this check Win32Platform.WindowsVersion > PlatformConstants.Windows8
It returns true i.e. for Windows Server 2012, because Win32Platform.WindowsVersion=6.2.9200, but PlatformConstants.Windows8=6.2.0

@fifty-six fifty-six mentioned this issue Jun 8, 2023
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yusupovdanil added a commit to yusupovdanil/Avalonia that referenced this issue May 15, 2024
@yusupovdanil
Fix for AvaloniaUI#7284
992ed7d 
Comparing WindowVersion with Windows8_1 instead of Windows8
@yusupovdanil yusupovdanil mentioned this issue May 15, 2024
Merged
github-merge-queue bot pushed a commit that referenced this issue May 20, 2024
@yusupovdanil @maxkatz6
Fix for #7284 (#15734)
1b27bf7 
Comparing WindowVersion with Windows8_1 instead of Windows8

Co-authored-by: Max Katz <maxkatz6@outlook.com>
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Fix for #7284 yusupovdanil/Avalonia
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@kekekeks @maxkatz6 @Symbai @telikey @stepangovorko