如何在ole自动化中声明类类型变量？ [英] how to declare class type variable in ole automation?

问题描述

我正在开发自动化应用程序。将VBA代码转换为C ++时。



回调为HYSYS.BackDoor

以上BackDoor是OLE Automation的类类型。



变量返回只是在VBA中声明，但c ++不是。



如何在ole中声明类类型变量自动化？



i不知道如何解决这个问题....



CoCreateInstance，CoGetObject ，Cogetclassobject ...



i在应用程序初始化时使用CoCreateInstance。当我得到应用程序对象时，我使用了CoGetObject。



当我声明外部（ole自动化服务器的类）类变量时，使用什么方法，函数，变量？br />


in VB

i'm developing ole automation application. while converting VBA code to C++.

Dim back As HYSYS.BackDoor
above "BackDoor" is OLE Automation's class type.

variable back is simply declared in VBA , but c++ is not.

how to declare class type variable in ole automation ?

i don't know how to solve this problem....

CoCreateInstance, CoGetObject, Cogetclassobject...

i used CoCreateInstance when application initializing. and when i got application object, i used CoGetObject.

when i declare external(ole automation server's class) class variable, what use method, function, variable ?

in VB

Dim hyapp As HYSYS.Application
Dim hycase As HYSYS.SimulationCase
Dim hyfs As HYSYS.Flowsheet

Dim back As HYSYS.BackDoor
Sub main()
    Set hyapp = CreateObject("HYSYS.application")
    Set hycase = GetObject("C\\test.hsc")
    Set hyfs = hycase.Flowsheet

    Call GetHyObj(hyfs)
End Sub
Function GetHyObj(hyfs As Flowsheet)
    For Each subOperation In hyfs.Operations("digitalop")
        Set back = subOperation    // autocasting data type 
        Set hyrv = back.BackDoorVariable(":selection.501").Variable
    Next
End function

汇入C ++

conver to C++

class CMSHysys //header
{
    public:
    IDispatch*  m_hyApp;
    IDispatch*  m_hyCase;
    IDispatch*  m_back;
    IDispatch*  m_hyfs;
}
void CMSHysys::Initialize(bool bVisible) 
// == Set hyapp = CreateObject("HYSYS.application")
{
    CoInitialize(NULL);
    CLSID clsid;

    m_hr = CLSIDFromProgID(L"Hysys.Application", &clsid);
    if(SUCCEEDED(m_hr))
    {
        m_hr = CoCreateInstance(clsid, NULL, CLSCTX_LOCAL_SERVER, IID_IDispatch, (void **)&m_hyApp);
        if(FAILED(m_hr)) m_hyApp=NULL;
    }
}

HRESULT CMSHysys::Connect(LPCTSTR szFilename) //.cpp
//==Set hycase = GetObject("C\\test.hsc")
{  
    m_hr = CoGetObject(szFilename, NULL,IID_IDispatch,(void **)&m_hyCase);

    if(FAILED(m_hr))  
    {
        printf("[-] connect fail\n"); 
    }
    else
    {
        printf("[+] connect ok\n"); 
    }

    VARIANT result;
    VariantInit(&result);  
    m_hr=OLEMethod(DISPATCH_PROPERTYGET, &result, m_hyCase, L"Flowsheet", 0);
    m_hyfs= result.pdispVal;

    if(FAILED(m_hr)) 
    {
       printf("[-] flowsheet fail \n");
    }
    else
    {
       printf("[+] flowsheet ok\n"); 
    }
}

上面代码中的
，hyapp == m_hyapp，hycase == m_hycase和back == m_back。



hycase（m_hycase）和hyfs（m_hyfs）依赖于hyapp（m_hyapp）。 back（m_back）是独立的。



所以，我不知道如何声明和使用m_back ......就像VB一样



只是我想知道如何声明变量（自动化服务器的内部数据类型）

in above code, hyapp == m_hyapp , hycase == m_hycase and back == m_back.

hycase(m_hycase)and hyfs(m_hyfs) depend on hyapp(m_hyapp). back(m_back) is independent.

so, i do not know how to declare and use m_back... like VB

just i want to know how to declare variable (ole automation server's inner data type )

推荐答案

我会查看扩展iDispatch的接口声明。 OLE使用已知接口，因此必须声明它。或者你写了一些神秘的代码，如：

I would go over an interface declaration like extending iDispatch. OLE works with known interfaces, so it must be declared. Or you write some mysterious code like:

LONG doAction( char *action, void* data);

其中action是一些命令和数据是一些进行的记忆。 ：-O





奖金：一些非官方的工具。

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