• Which the release of FS2020 we see an explosition of activity on the forun and of course we are very happy to see this. But having all questions about FS2020 in one forum becomes a bit messy. So therefore we would like to ask you all to use the following guidelines when posting your questions:

    • Tag FS2020 specific questions with the MSFS2020 tag.
    • Questions about making 3D assets can be posted in the 3D asset design forum. Either post them in the subforum of the modelling tool you use or in the general forum if they are general.
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    • Questions about airport design can be posted in the FS2020 airport design forum. Once airport development tools have been updated for FS2020 you can post tool speciifc questions in the subforums of those tools as well of course.
    • Questions about terrain design can be posted in the FS2020 terrain design forum.
    • Questions about SimConnect can be posted in the SimConnect forum.

    Any other question that is not specific to an aspect of development or tool can be posted in the General chat forum.

    By following these guidelines we make sure that the forums remain easy to read for everybody and also that the right people can find your post to answer it.


  1. Noah B.

    Load a DLL upon simulator startup

    Hi, I am trying to get a DLL to load upon MSFS startup based on this post Here is the xml entry I add in exe.xml <Launch.Addon> <Name>A name</Name> <Disabled>false</Disabled> <Path>C:\path-to-my-dll.dll</Path> </Launch.Addon> I have verified that the file does indeed exist. The...
  2. K

    How to debug a DLL in P3D V4?

    Hi all I got some code a few months back to interface my self-made hardware with p3d. It is written in c++ and creates a DLL. I have added a few more buttons and switches and they all work except for one. The person which created this is no longer reachable unfortunately. I do have some basic c...
  3. E

    FSX:SE Using timers

    Hello experts, For those of you who develop in C/C++ using the Windows API, I would like to share a problem I had. I am developing a DLL module that is loaded when FSX starts, it gets the FSX window handle to get the messages such as key up/down events to manage them. In addition, I had to use...
  4. E

    FSX:SE Sharing DLL dev experience

    Let me tell you the story about what happened to me, hoping it may be useful to some of you. I was developing a DLL for FSX Steam Edition, a module that is loaded when FSX starts. I was in a development process : write code, generate DLL, launch FSX to test, stop FSX, update code, re-run FSX...

    P3D v4 Simconnect Event catcher problem | Custom EVENTs | PDK DLL problem

    Hello all 1) in my simconnect programme i wanted to send an event and catch it in the sim i tried sending a full throttle event to The User aircraft, and it worked how i catch : i use a text message that appears when the sim recive the event 2) now i want to send events but to custm simobjects (...
  6. E

    FSX Gauge doesn't unload...

    Hello, I am running into a problem that is driving me crazy... After so many years in FS development, I never saw this. I was fixing a small bug in my Airbus Series that I now use with FSX. The series is compsed of 7 aircraft (A318, A319CFM, A319IAE, A320CFM, A320IAE, A321CFM and A321IAE). With...

    P3D v4 DLL addons logic ?

    Hello i made some addons with the simconnect api, only EXE addons i saw that some people use DLLs and i just wanted to know the DLL logic in P3D and is it just for C++ how will P3D know which class to run and will he run it for ever ? is there any way that the DLL be built in C# ? in the SDK...

    DLL files in the flight sim

    Hello guys i saw many addons like FSUIPC that use a DLL i mean it runs with a DLL ( the programme is in the DLL ) ;P i know that DLL files ( at least in C# ) include classes / fonctions / variables / structers ........ but in the flight sim : what can a DLL contain ? i mean how to make a...
  9. delivery guy

    P3D v4 Upgrading a DLL from 32bit to 64bit

    I have the source code / file TrafficRadar.DLL from Doug Dawson website. Download This is open source as long as you give credit to the original developer Arne Bartels. I have no issues loading this source code into Visual C++ 2017 and exporting as a x64 platform. But P3D V4 will crash. (Also...
  10. M

    Trouble Loading a Simconnect DLL from dll.xml

    Hi folks, I wonder if a couple of you wouldn't mind pondering my predicament for a couple minutes, I'd be exceedingly grateful: Problem: When my DLL loads, the sim freezes and never recovers. I get no errors in my simconnect log file. The last message is that the previous dll has loaded...
  11. Ronald

    DLL-powered-gauges vrs XML-powered-gauges

    With the recent news that P3D and FSW are "going 64-bits" and the changes in their support of (64-bits) add-ons I was wondering: "What are the technical and internal differences between DLL-powered gauges vrs XML-powered-gauges" What i've learned myself so far is that: A - DLL-powered-gauges...