Reading .dll file qt

[V0rtex]

I have qlsate.dll . And how can i use function from it ?

qlsate32.dll (3)
Ordinal	Hint	Function	EntryPoint	EntryName
1	1	qlsate	0x00001330	
2	2	qlsate_results_data	0x00002000	
3	0	?qlsrpc@@YGHPAURPCHEADER@@PAURPCSEND@@PAURPCRECV@@@Z	0x00001000	

When i checked it it has a qlsate function.
In visual studio c#

[DllImport("qlsate32.dll", CharSet = CharSet.Ansi)]
        public static extern int qlsate(ref ATEHEADER udtAteHeader, ref ATEDATA udtAteData);

using style like this but how can i use it in qt ?

[V0rtex]

@jsulm i got some error but it works now

this is first prototype

ATEHEADER mudtAteHeader = *new ATEHEADER();
    ATEDATA mudtAteData = *new ATEDATA();
    mudtAteHeader.sSerialNumber = "demo";
    mudtAteHeader.sCellId = "demo2";
    mudtAteHeader.sDateTime = "demo3";
    mudtAteData.iDataLength = 20;
    mudtAteData.iRecordCount = 50;
    mudtAteData.sDataBuffer = "demo4";

    QLibrary myLib("qlsate32.dll");
    myLib.load();
    if(myLib.isLoaded())
    {
        qDebug()<< "Dll is opened.";
        typedef int (*MyPrototype)(ATEHEADER udtAteHeader, ATEDATA udtAteData );
        MyPrototype qlsate = (MyPrototype) myLib.resolve("qlsate");
        if (qlsate)
            qDebug()<<qlsate(mudtAteHeader,mudtAteData);
    }

this is second prototype

ATEHEADER mudtAteHeader = *new ATEHEADER();
    ATEDATA mudtAteData = *new ATEDATA();
    mudtAteHeader.sSerialNumber = "demo";
    mudtAteHeader.sCellId = "demo2";
    mudtAteHeader.sDateTime = "demo3";
    mudtAteData.iDataLength = 20;
    mudtAteData.iRecordCount = 50;
    mudtAteData.sDataBuffer = "demo4";
    if (QLibrary::isLibrary("qlsate32.dll")) {
          QLibrary lib("qlsate32.dll");
          lib.load();
          if (!lib.isLoaded()) {
            qDebug() << lib.errorString();
          }
          if (lib.isLoaded()) {

            typedef int (*FunctionPrototype)(ATEHEADER udtAteHeader, ATEDATA udtAteData);

            auto function1 = (FunctionPrototype)lib.resolve("qlsate");

            int iRetCode;
            if (function1)
            {

                iRetCode = function1(mudtAteHeader,mudtAteData);

            }


            qDebug()<< iRetCode;
            //if (function2) function2(0, "hello world!");
          }
        }

both of them is working thank you.

[jsulm]

@V0rtex Do you also have a header file for that DLL? Is this DLL managed (.Net) or pure C/C++? From where do you have this DLL? Is it 32bit or 64bit?
If you don't have header file check https://doc.qt.io/qt-5/qlibrary.html

[V0rtex]

@jsulm i don't have header file.
Its DLL managed.
And it is 32bit.

[jsulm]

@V0rtex If it is managed you will have to use UWP Qt version (managed) and also check https://doc.qt.io/qt-5/qlibrary.html.

[V0rtex]

@jsulm

QLibrary myLib("qlsate32.dll");
    myLib.load();
    if(myLib.isLoaded())
    {
        qDebug()<< "Dll is opened.";
    }
    typedef int (*MyPrototype)(ATEHEADER udtAteHeader, ATEDATA udtAteData );
    MyPrototype qlsate = (MyPrototype) myLib.resolve("qlsate");
    if (qlsate)
        qDebug()<<qlsate(mudtAteHeader,mudtAteData);

i did something like that.
is it like you describe right ?

[jsulm]

@V0rtex Yes. Does it work?

[V0rtex]

@jsulm i got some error but it works now

this is first prototype

ATEHEADER mudtAteHeader = *new ATEHEADER();
    ATEDATA mudtAteData = *new ATEDATA();
    mudtAteHeader.sSerialNumber = "demo";
    mudtAteHeader.sCellId = "demo2";
    mudtAteHeader.sDateTime = "demo3";
    mudtAteData.iDataLength = 20;
    mudtAteData.iRecordCount = 50;
    mudtAteData.sDataBuffer = "demo4";

    QLibrary myLib("qlsate32.dll");
    myLib.load();
    if(myLib.isLoaded())
    {
        qDebug()<< "Dll is opened.";
        typedef int (*MyPrototype)(ATEHEADER udtAteHeader, ATEDATA udtAteData );
        MyPrototype qlsate = (MyPrototype) myLib.resolve("qlsate");
        if (qlsate)
            qDebug()<<qlsate(mudtAteHeader,mudtAteData);
    }

this is second prototype

ATEHEADER mudtAteHeader = *new ATEHEADER();
    ATEDATA mudtAteData = *new ATEDATA();
    mudtAteHeader.sSerialNumber = "demo";
    mudtAteHeader.sCellId = "demo2";
    mudtAteHeader.sDateTime = "demo3";
    mudtAteData.iDataLength = 20;
    mudtAteData.iRecordCount = 50;
    mudtAteData.sDataBuffer = "demo4";
    if (QLibrary::isLibrary("qlsate32.dll")) {
          QLibrary lib("qlsate32.dll");
          lib.load();
          if (!lib.isLoaded()) {
            qDebug() << lib.errorString();
          }
          if (lib.isLoaded()) {

            typedef int (*FunctionPrototype)(ATEHEADER udtAteHeader, ATEDATA udtAteData);

            auto function1 = (FunctionPrototype)lib.resolve("qlsate");

            int iRetCode;
            if (function1)
            {

                iRetCode = function1(mudtAteHeader,mudtAteData);

            }


            qDebug()<< iRetCode;
            //if (function2) function2(0, "hello world!");
          }
        }

both of them is working thank you.

[V0rtex]

@jsulm by the way can you look at this topic
https://forum.qt.io/topic/122405/unknown-module-s-in-qt-opcua/5