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MSFS C# SimConnect Windows Form example


Staff member
Resource contributor
Attached is a C# windows form example of the MSFS SimConnect.

MSFS .NET requires both the Microsoft.FlightSimulator.SimConnect.dll (.NET) and the SimConnect.dll (native C++) to be in the folder with the finished program. Look near the final lines of TCalc_004.csproj.:
    <Content Include=".\SimConnect.dll">

This will copy the SimConnect.dll to the finished debug or release folder in VS19.

The code is C# v4.72, I believe, and AnyCPU. It won't work with x86 because the SimConnect.dll is 64-bit.


  • TCalc_Code.zip
    297.6 KB · Views: 446
I use VS code and I did <PlatformTarget> x64
You can also use PreserveNewest instead of Always, not that it matters really.

Also for anyone reading this that uses VS Code or otherwise, if you keep SDK in a folder somewhere else you can use:

    <ContentWithTargetPath Include="$(MSFS_SDK)/SimConnect SDK/lib/SimConnect.dll">

edited: to use the evironment variable forgot I had done that. I installed from MSFS2020 dev mode installer and it set an environment variable MSFS_SDK
Last edited:
you can place this in Visual Studio (config) Build Events and it will copy the files when you build a new version.

xcopy "C:\MSFS SDK\SimConnect SDK\lib\SimConnect.dll" "$(TargetDir)" /y
xcopy "C:\MSFS SDK\Samples\SimvarWatcher\SimConnect.cfg" "$(TargetDir)" /y
Does this mean that you have to include a copy of the dlls in your setup program, or is there a specific folder to put your program into? I understand that webassembly modules are to be put into a modules sub folder. But what about standalone exe's?