Managed C++/CLI

CTaylor89 wrote:

Is there a way to execute the Dispose function

If an object created using stack semantics goes out of scope. For more information, see C++ Stack Semantics for Reference Types.
If an exception is thrown during the object's construction.
If the object is a member in an object whose destructor is running.
If you call the delete Operator (C++) on a handle (^ (Handle to Object on Managed Heap)).
If you explicitly call the destructor.

Mark Salsbery
Microsoft MVP - Visual C++

CTaylor89 wrote:

According to Statement #4 shouldn't the Dispose function of the managed object be called?

Mark Salsbery
Microsoft MVP - Visual C++

///////////////////////////////////////////////////////////
// C#

public class TestDisposable : IDisposable
{
   private IntPtr handle;
   private bool disposed = false;

   public TestDisposable(IntPtr handle)
   {
      this.handle = handle;
   }

   public void Dispose()
   {
      Dispose(true);
      GC.SuppressFinalize(this);
   }

   private void Dispose(bool disposing)
   {
      if(!this.disposed)
      {
         if(disposing)
         {
            // Dispose managed resources.
         }

         // Dispose unmanaged resources.
         handle = IntPtr.Zero;

         disposed = true;
      }
   }
}



///////////////////////////////////////////////////////////
// C++

   TestDisposable ^testdisposable = gcnew TestDisposable(IntPtr(3));
   delete testdisposable;

Mark Salsbery
Microsoft MVP - Visual C++

CTaylor89 wrote:

and apparently this matters to C++/cli

Mark Salsbery
Microsoft MVP - Visual C++

Aniket Salunkhe wrote:

How can I use this class in my new VC++.Net application?

Mark Salsbery
Microsoft MVP - Visual C++

Xaria wrote:

wish to use BlowFish encryption for my project. How do I pass the value from the form textbox to the Blowfish Encrypt function?
The Blowfish algo is written in Classic C++, but the Form is in managed C++.

[DllImport("shell32.dll", CallingConvention = CallingConvention::Cdecl)]
extern int SHGetKnownFolderPath([MarshalAs(UnmanagedType::LPArray)] array<Byte> ^ar, UInt32 dwFlags, IntPtr hToken, [Runtime::InteropServices::Out] IntPtr %ppszPath);

...

String^ str;
IntPtr path;

array<Byte> ^ar = KnownFolders::AddNewPrograms->ToByteArray();
if(SHGetKnownFolderPath(ar, 0, IntPtr::Zero, path) == 0)
{
	str = System::Runtime::InteropServices::Marshal::PtrToStringAuto(path);
	System::Runtime::InteropServices::Marshal::FreeCoTaskMem(path);
}

Mark Salsbery
Microsoft MVP - Visual C++

Debasis10 wrote:

call a .Net Interface/DLL from c++ code?

Mark Salsbery
Microsoft MVP - Visual C++