Question

Is there a way to use (reference) a DLL written in an unmanaged C++ (not a COM library) in my C# application?

When I try to reference it from within Visual Studio, I get ‘not a COM object’ error message.

Maybe there is some kind of translator\router that would COMify my DLL reference? I have no clue how COM and COM interop work, since I started programming when this was already unnecessary for me.

Thank you.

Answer 1

You need to use the DllImport attribute. Here’s an example for the Win32 PostMessage function:

[DllImport('user32.dll', SetLastError = true)] [return: MarshalAs(UnmanagedType.Bool)] internal static extern bool PostMessage(IntPtr handle, int message, IntPtr wparam, IntPtr lparam);