So I have this perfectly fine and running app, that uses managed C++
forms.

Problem#1:

[1] I pass a Bitmap reference to a class, hoping to modify it in one
of the class's methods, so it reflects outside too. Something like
this:

// In a form's scope
Bitmap  ^m_Bitmap;

// A separate class
template<typename T> ref class ManagedImageModifier
{
  public:
      ...
      ...

      bool ChangeImage(Bitmap^ iImage)
      {
         // change iImage here
         ....
         return true;
      };

};

This builds fine. The problem is that iImage has a different address
in memory than the reference I pass in. Obviously this means any
change to iImage isnt reflected outside. This came as a surprise
initially to me as I am new to managed programming.

Problem#2:
Anyways, I chose to classify this parameter as a reference variable,
by using 'ref' keyword. Something like this

bool ChangeImage(ref Bitmap^ iImage)
      {
         // change iImage here
         ....
         return true;
      };

And now I get this compile error:

error C2061: syntax error : identifier 'ref'

Note that the same keyword when used to classify the class
ImageModifier wasnt giving me errors.

Any clues on whats going on here????

Thanks a lot!

-P.