I'm pretty sure that I'm missing an include, or a reference, or something.

I'm quite new to Visual Studio 2005, so it's probably something like the above.

My problem is that I've got a Class Library project that creates a .dll file.

in the solution explorer I went to the project and did an Add->Class->CLR Windows Form. I ended up with class loggerClass : form, which makes sense.

For the life of me, I don't seem to be able to get this class to call MessageBox.Show("string"); ! In the loggerClass.h header file it's got:

     using namespace System::Windows::Forms;

and I declare public function void myShow(String ^ a);

Then in loggerClass.cpp I've got

(in the right namespace)

void loggerClass::myShow(String ^ a)
{
    MessageBox.Show(a); // error C2143: syntax error : missing ';' before '.'
    System::Windows::Forms::MessageBox.Show(a); // same error
}


I've tried a dozen different ways to get this to work, but no luck at all.

The crazy thing is that if I add a C# class to the project (using the technique at http://blogs.msdn.com/frankpr/archiv...27/198918.aspx ) I can call MessageBox directly from the C# class, simply as

     MessageBox.Show(a);

no complaints at all. And I'm compiling this with the command-line compiler so there aren't any special command-line options at work.