I am investigating the possibilities to use IPC between a Lazarus and a Delphi7 application running on Windows. I was discussing this on the Lazarus forum where I got a tip to use SimpleIPC, which apparently is delivered with the Fpc compiler itself.
The tip was given in this post: https://forum.lazarus.freepascal.org/index.php/topic,62867.msg475663.html#msg475663 In that post is a link to a GitHub project which simplifies ipc usage by creating a dll packaging everything needed so that the dll could be used from other applications developed in other languages too. Sounds good to me. Here is the GitHub project url: https://github.com/z505/SimpleIPC-lib So I downloaded this and using Lazarus 2.2.4 and Fpc 3.2.2 on Windows 10 x64 I did this: 1) opened the dll project and compiled the dll itself. 2) Opened the demo-lazarus\ipcclient project and compiled it 3) Opened the demo-lazarus\ipcserver project and compiled it So now I could start the ipcclient app and it shows its form with a button to send data to the server. When I used it there was an error message about "not finding the server". To be expected, since I had not started the server... So I next tried to start the server app, but it immediately shows an error box with the text: ------------------- Application error The application was unable to start correctly (0xc000007b). Click OK to close the application. [OK] ------------------- I have tried various things like changing target for the dll and both applications to win32 (I have the cross for Win32 installed), but the exact same happens. And I have no idea whatsoever on where to look for a reason for this to happen. I have even put a breakpoint into the server code at the earliest point I could find and started it from Lazarus, but get the same error dialog and no breakpoint reached... I tried reading https://wiki.freepascal.org/SimpleIPC but got no idea from that either... What to do now? I am not clever enough to figure out if there is some error in the GitHub project. Not used to windows communications at all. What I want to do is to create an ipc link to a Delphi7 server app from a Lazarus/fpc client app to use the D7 app to read a hardware device on command and send the data to the Lazarus app. It is not possible to compile the D7 app on Lazarus because there is a device manufacturer's obj file involved and it is apparently of the wrong format for Lazarus/Fpc to use. It can be linked to in Delphi7 but not in Lazarus/Fpc. Hence the D7<=ipc=>Lazarus IPC communication... I really do hope this can be fixed so I can get the ipc comm line to the D7 interfacing app working! -- Bo Berglund Developer in Sweden -- _______________________________________________ lazarus mailing list lazarus@lists.lazarus-ide.org https://lists.lazarus-ide.org/listinfo/lazarus
