Question

我尝试创建一个COM对象并从Qt中的对象获取接口。所以Qt作为COM客户端。在我的示例中，COM服务器是CANoe COM服务器。

这是我的Qt pro文件的源代码和我的interface.cpp文件，我尝试建立与CANoe的连接：

专业档案：

# Add more folders to ship with the application, here
folder_01.source = qml/3com_interface
folder_01.target = qml
DEPLOYMENTFOLDERS = folder_01

# Additional import path used to resolve QML modules in Creator's code model
QML_IMPORT_PATH =

# If your application uses the Qt Mobility libraries, uncomment the following
# lines and add the respective components to the MOBILITY variable.
# CONFIG += mobility
# MOBILITY +=

# The .cpp file which was generated for your project. Feel free to hack it.
SOURCES += main.cpp \
    interface.cpp

# Installation path
# target.path =

# Please do not modify the following two lines. Required for deployment.
include(qtquick2applicationviewer/qtquick2applicationviewer.pri)
qtcAddDeployment()

HEADERS += \
    CANoe.h \
    interface.h

CONFIG += qaxcontainer

interface.cpp

#include "interface.h"
#include <QDebug>
#include "objbase.h"
#include "CANoe.h"

#include "windows.h"
#include "winnls.h"
#include "shobjidl.h"
#include "objidl.h"
#include "shlguid.h"

#include "strsafe.h"


Interface::Interface(QObject *parent) :
    QObject(parent)
{
}

void Interface::trigger_slot(const QString &msg)
{


    IApplication* pIApp;
    HRESULT result;

    result = CoInitialize(NULL);

    CLSID clsid;
    result = CLSIDFromProgID(L"CANoe.Application", &clsid);

    if(SUCCEEDED(result))
    {
        qDebug() << "CLSID saved";
    }

    const IID IID_IApplication = __uuidof(IApplication);

    result = CoCreateInstance(clsid, NULL, CLSCTX_LOCAL_SERVER, IID_IApplication, (void**) &pIApp);

    if(SUCCEEDED(result))
    {
        qDebug() << "Connection established";
    }

}

当我尝试构建程序时，我收到以下错误代码：未定义引用'_GUID const＆amp; _mingw_uuidof（）'

有人知道如何在Qt和COM服务器之间创建COM接口吗？我在互联网上搜索了几个小时，但没有找到任何解释。仅用于使用ATL使用Visual Studio访问COM服务器。但我不能在Qt中使用ATL。

Answer 1

__uuid可以方便地获取COM类的GUID，但任何其他方法也都可以。除此之外，您的代码应该可以工作。

错误消息看起来像一个MinGW链接错误（相关信息不足以确定），表明您错过了一个MinGW COM库。

在Qt中创建COM对象

1 个答案: