sending pointer from C++ to C#

[arjun404346]

Hello all,
I have to send a pointer from C++ to C#. How can I do this?
Error message I am getting on the C# program is
"Pointers and fixed size buffers may only be used in an unsafe context"
Please help.

[GaryTexmo]

When using pointers in C#, you need to wrap the code in an unsafe code block.

unsafe
{
  // your pointer operations here
}

[arjun404346]

thnx,
now its showing error
"Unsafe code requires the 'unsafe' command line option to be specified
:( :(

[GaryTexmo]

In the Solution Explorer, find your project (the one that contains the unsafe code). Right-click and select properties. In the left-hand pane, select the Build tab.

In the first category, General, there should be a checkbox that says "Allow unsafe code".

Check this and save the properties.

[arjun404346]

Actually I am working on unity3d and there is no setting option for compiling. I have to send a pointer from a C++ program (which is being compiled on Visual C++) to C# program (which is being compiled by unity3d compiler).

I have to change IplImage (contained in openCv library for C) to Texture2D image (used by unity3d) and for that I have to tell unity3d where this IplImage is stored in the memory. And so I need to send a pointer

[GaryTexmo]

Google around for it. It's a command line switch on the compiler itself. If you're not using Visual Studio, you'll have to figure out how to enable that as a compile option on the tool you are using.

I'm think it might be something as simple as adding /unsafe to the command line for it, but I'm not sure... which is why you should look it up :)