Managed C++/CLI

led mike wrote:

I would be interested in knowing the answer to this.

The default behavior of a class that takes a Stream in it’s Constructor is to also be IDisposable and close the stream when the wrapper is closed.

StreamWriter^ writer;
CryptoStream^ crypto;
MemoryStream^ memory;        

try
{
    writer = gcnew StreamWriter(
        crypto = gcnew CryptoStream(
            memory = gcnew MemoryStream(),
            tdes->CreateEncryptor( key, iv ),
            CryptoStreamMode::Write
        )
    );

    writer->Write( ... );
}

catch( System::Exception^ e )
{
    crypto->Close();
    Console::WriteLine(L"CLR Exception: {0}", e->Message);
}

finally
{
    writer->Close( );
}

Manny Roxas wrote:

2. I developed a wrapper function that the unmanaged DLL will use to print its message.

Mark Salsbery
Microsoft MVP - Visual C++

#include <vcclr.h>

// Global variable (or whatever scope it needs to be)
gcroot<Form1 ^> MyWindowsForm;
...
MyWindowsForm = gcnew Form1();

Mark Salsbery
Microsoft MVP - Visual C++

wrote:

CLI is the most powerful language!!

Christian Graus wrote:

Nishant Sivukumar has an excellent book on the topic, it's published by Manning.

Som Nath Paul wrote:

Its really excellent, but it is not for intermediate developers..

enum class Instruction {sit, sleep, jog};

ref class DataPack
{
public: 
    Instruction xxx;
    DataPack(array<Byte>^ data)
    {
        this->xxx = safe_cast<Instruction>(BitConverter::ToInt32(data, 0));
    }
};

Mark Salsbery
Microsoft MVP - Visual C++

Jeffrey Walton wrote:

const_cast< interior_ptr<byte> >(key);