GDI+ problem

[Lloyd Dupont]

I'm working in ManagedC++

In the OnPaint of my control I get a System:rawing::Graphics object to
which I apply some transformation (Scaling, smoothing mode, clipping and so
on).

Later on I need to call a function of the #include <GdiPlusFlat.h> API.

How do I get a "GpGraphics*" from a "System:rawing::Graphics^" ?

 

[Lloyd Dupont]

I'm trying to use the C++ interface.
I included <GdiPlus.h>

Which begins by "namespace Gdiplus.h".
However when I try to use it, and for example write
using namespace Gdiplus;

I have a synxatx error: "a namespace with this name does not exist"
mmhh???
what happen? what should I do?