Cannot open include file <Project Path>packages\<...>\Microsoft.Foundation.h

Question

Cannot open include file <Project Path>packages\<...>\Microsoft.Foundation.h

Cosmin Mihai 35

When adding a new IDL file (ProjectItem.idl along with ProjectItem.h and .cpp) I get the following error:

1><path>ProjectItem.g.h(52,10): error C1083: Cannot open include file: '<path>\packages\Microsoft.WindowsAppSDK.1.4.231219000\lib\uap10.0.18362\Microsoft.Foundation.h': No such file or directory

If I go to the ProjectItem.g.h file I can see the include: #include "<project>\packages\Microsoft.WindowsAppSDK.1.4.231219000\lib\uap10.0.18362\Microsoft.Foundation.h" Then if I go to the path <project>\packages\Microsoft.WindowsAppSDK.1.4.231219000\lib\uap10.0.18362\, I can see that the Microsoft.Foundation.h is missing:

Directory: packages\Microsoft.WindowsAppSDK.1.4.231219000\lib\uap1
    0.0.18362
Mode                 LastWriteTime         Length Name
----                 -------------         ------ ----
-a----        15.12.2023     01:16           1536 Microsoft.Foundation.winmd
-a----        20.12.2023     00:52            219 Microsoft.Foundation.xml
-a----        15.12.2023     01:16          11264 Microsoft.Graphics.winmd
-a----        20.12.2023     00:52          26946 Microsoft.Graphics.xml
-a----        15.12.2023     01:16         259072 Microsoft.UI.winmd
-a----        20.12.2023     00:52         492724 Microsoft.UI.xml

What could be the problem? Why is the generated file containing a header that is missing? Note: The project is a "Blank App, Packaged with Windows Application Packaging Project (WinUI3 in Desktop)" that I just created.

Cosmin Mihai 35 Reputation points

2024-02-16T04:50:15.8633333+00:00
The simple test case can be found here: https://github.com/cosmin42/cpp-photobook On this branch:

issue/windows-foundation-not-found

Under windows\PhotobookUI\PhotobookUI.sln The project

PhotobookRuntimeComponent

which is independent of the other projects in the solution. Thank you!
Tong Xu - MSFT 2,546 Reputation points Microsoft External Staff

2024-02-16T05:06:14.2033333+00:00

@Cosmin Mihai I will make a research on that. Sorry for the delay.
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1 answer

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Cosmin Mihai 35 Reputation points

2024-02-16T04:50:15.8633333+00:00

The simple test case can be found here: https://github.com/cosmin42/cpp-photobook On this branch:

issue/windows-foundation-not-found

Under windows\PhotobookUI\PhotobookUI.sln The project

PhotobookRuntimeComponent

which is independent of the other projects in the solution. Thank you!
Tong Xu - MSFT 2,546 Reputation points Microsoft External Staff

2024-02-16T05:06:14.2033333+00:00

@Cosmin Mihai I will make a research on that. Sorry for the delay.
Deleted

This comment has been deleted due to a violation of our Code of Conduct. The comment was manually reported or identified through automated detection before action was taken. Please refer to our Code of Conduct for more information.

Answer 1

Tong Xu - MSFT 2,546 Microsoft External Staff

HI, @Cosmin Mihai Sorry for the delay.
I've already tried to reproduce it.

After adding the "Projectitem.cpp", I didn't see any error about #include <winrt/Windows.Foundation.h>.

And you got wrong directory. Also, It within "……\Generated Files\winrt". So please check this directory.
fundation.h

If you still have the issue. You might need to reinstall something on windows app sdk with C++.

C++(v143)Universal Windows Platform Tools.

2.Windows app sdk C++ template in Desktop Development with C++. Windowappsdkinstall

Cosmin Mihai 35 Reputation points

2024-02-20T19:15:53.9133333+00:00

What do you mean I got wrong directory? MIDL is generating the wrong include and I do not know how to change that. Where did you add the ProjectItem.cpp file? It is already added under windows\PhotobookRuntimeComponent .
Tong Xu - MSFT 2,546 Reputation points Microsoft External Staff

2024-02-21T02:33:32.5633333+00:00

@Cosmin Mihai Microsoft.Foundation.h is not belong to this directory.

Also, I think I reproduced your issue. I create a new Blank App, Packaged with Windows Application Packaging Project (WinUI3 in Desktop). It shows error before debugging.
Actually, it can pass the compilation. It will build the generated file and debug file successfully after debugging local machine (F5).
So please add your new IDL file after passing the compilation**.**
Cosmin Mihai 35 Reputation points

2024-02-24T10:52:24.75+00:00

After some debugging, the solution is to name the header file as %(Filename)_g.h instead of %(Filename)_g.h .

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Cannot open include file <Project Path>packages\<...>\Microsoft.Foundation.h

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