C dll from mingw in C#

Question

I want to call a function from a C dll. This dll was created by compiling on ubuntu/mingw. I want to use this dll functions in C#. How can I do this?

Answer 1

You need to define a managed signature using the [DllImport] attribute and then P/Invoke into the unmanaged library. Example from MSDN calling the MessageBox function from user32.dll:

using System;
using System.Runtime.InteropServices;

class Example
{
    // Use DllImport to import the Win32 MessageBox function.
    [DllImport("user32.dll", CharSet = CharSet.Unicode)]
    public static extern int MessageBox(IntPtr hWnd, String text, String caption, uint type);

    static void Main()
    {
        // Call the MessageBox function using platform invoke.
        MessageBox(new IntPtr(0), "Hello World!", "Hello Dialog", 0);
    }
}

Answer 2

1. Add the DLL as a project resource
2. Add the Using statement to associate the dll
3. code away.

See Also: Adding a dll file to a C# project