C++ Problems

I'm using Visual C++ 2005 to make a simple little program. I'm getting compiler errors with the following:

private: System::Void BoxMouseDown(System::Object^  sender, System::Windows::Forms::MouseEventArgs^  e) {
    if ( e.Button == MouseButtons.Left ) {
        //Shit goes here
    }
}

I've tried the MSDN site, using examples directly from it, but no surprise at all when the shit didn't work.

>>1
Why are you using that horrible abomination called C++/CLI? If you want to use the .NET framework just use C#.