cannot declare a managed variable in unmanaged classs

guys,

how do you you all settle the above problem with a breeze..

i thought that __nogc class will give way to mix the unmanaged and managed types and declaration?

Quote:

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i thought that __nogc class will give way to mix the unmanaged and managed types and declaration?

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The keyword __nogc on a class or struct indicates that it is an unmanaged C++ class or struct.

Quote:

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cannot declare a managed variable in unmanaged classs

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To use manages types in unmanaged code you need to use the GCHandle struct.

To declare a managed variable reference in an unmanaged class you have to use the gcroot<> templated class e.g.

Code:

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class CMyUnmanagedClass
{
public:
    CMyUnmanagedClass(System::String *psString)
    {
        m_psString = psString;
    }

    void Test()
    {
        System::Diagnostics::Debug::WriteLine(m_psString);
    }

private:
    gcroot<String *> m_psString;
} ;

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It behaves like a smart pointer i.e. it has overloads for ->, = etc etc (as shown in the Test() method above).

Okay ?

You can also use gcroot in STL declarations : this is how you can have a std::vector of String * (for instance) e.g.

Code:

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std::vector<gcroot<String *> > asStrings;

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Darwen.