I have a cross-platform library written with C++, I use this library to create model and display it with OpenGL. Now I'd like to choose MAUI to create a desktop application and call above library to complete interactions. Now I need a sample for reference on how to collabrate with c++ library/codes in MAUI application.

Hi @Yang Yang , We can use P/Invoke to consume a native library, you could try to check this doc - Use C/C++ libraries with Xamarin , then try to adjust to implement a version of MAUI. Please feel free to let me know if you have any other issues. Best Regards, Wenyan Zhang If the answer is the right solution, please click " Accept Answer " and kindly upvote it. If you have extra questions about this answer, please click " Comment ". Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

Is there a sample MAUI application to call c++ libarary

Accepted answer

Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 32,781 Reputation points Microsoft Vendor

2022-06-15T08:24:41.6+00:00

Hi @Yang Yang ,

We can use P/Invoke to consume a native library, you could try to check this doc - Use C/C++ libraries with Xamarin, then try to adjust to implement a version of MAUI. Please feel free to let me know if you have any other issues.

Best Regards,
Wenyan Zhang

If the answer is the right solution, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
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3 people found this answer helpful.
Yang Yang 46 Reputation points

2022-06-16T01:02:49.23+00:00

Thanks for your answer, how can I mark this question as answered?

Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 32,781 Reputation points Microsoft Vendor

2022-06-16T01:21:53.313+00:00

I converted it to an answer, you could check it.

Wenyan Zhang (Shanghai Wicresoft Co,.Ltd.) 32,781 Reputation points Microsoft Vendor

2022-06-24T07:29:54.997+00:00

May I know if you have got any chance to check my answer? I am glad to help if you have any other questions.

Brian Johnson 0 Reputation points

2024-08-25T00:36:39.4333333+00:00

The referenced article is very good! I myself used it to successfully make the NuGet packages for 2 C++ libraries I needed for my Xamarin.Forms mobile application. The article was, however, written in 2019 for Xamarin (which is now depreciated) on Visual Studio for Mac (which will no longer be supported soon). Now I am converting my apps to MAUI and the NuGet packages I made for Xamarin.Forms do not work for MAUI. Is there something similar written for MAUI and Visual Studio 2022 for Windows? I haven't been able to find anything so far and don't know exactly how to "adjust to implement a version of MAUI".

UPDATE:

After coming back to this post to add specific details on what was failing when I tried to use the NuGet packages I made for Xamarin.Forms, I found that I had made some changes to the VS Code script that creates the libraries for each architecture. While I think the changes were necessary at the time (and they continue to work for Xamarin.Forms) this is apparently what was causing my problems. After going back to the VS Code script as documented, my NuGet packages now work for MAUI. I am sorry if this caused any confusion.

UPDATE:

Per the above note I can now build the NuGet packages I need to continue my MAUI conversions. However, I still can only make them on VS Code for the Mac. The $SHELL scripts used for Xamarin.Forms on VS Code for Mac need to be converted to Powershell scripts to be run on VS Code for Windows. I used ChatGPT to do the conversion but the paths to SDKROOT are paths to Xcode files for iOS and paths to Xamarin files for android. What are the equivalent paths to use for a VS code build on Windows?

Overall, this is NOT the correct answer to this question. I cannot believe there isn't a better way to build C/C++ library code to create a cross platform NuGet package for MAUI. I am specifically building library code provided by government agencies (NOAA and USNO), so they are a little behind the times. Can somebody else help? How do I reject this answer?
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