c++ Forms

I don't understand how to call another form from a button click event in one form.  In c# I could write something like:

Form2 theOtherForm = new Form2();

theOtherForm.ShowDialog();

When I try to do something like this in C++, it gives me error C3673.

I read about the error here:
http://msdn.microsoft.com/en-us/library/ms173670(VS.80).aspx

I didn't understand it though.

Can someone explain to me what I'm doing wrong.

Sepples compiler messages are a way of telling you whether you should be using the language at all.

They are all of the form "I tried three or four different ways of interpreting your pathetic attempts at the syntax, and will only tell you about the least obvious one, ideally referring to a location some hundreds of lines away from where you made the actual mistake."