Agile Pointer Warning in Release Build

Question

Hi Everyone,

In the release version of my project I am getting a warning that I can't figure out and I can't find any information concerning it:

ViewProvider.h(22): warning C4451: 'ViewProvider::m_window' : Usage of ref class 'Windows::UI::Core::CoreWindow' inside this context can lead to invalid marshaling of object across contexts (Main.cpp)
1>          Consider using 'Platform::Agile<Windows::UI::Core::CoreWindow>' instead

The class declaration looks like this:

ref class ViewProvider sealed : public Windows::ApplicationModel::Core::IFrameworkView
{
public:
	virtual void Initialize(Windows::ApplicationModel::Core::CoreApplicationView^ applicationView);
    void Initialize(Windows::UI::Core::CoreWindow^ window, Windows::ApplicationModel::Core::CoreApplicationView^ applicationView);
    virtual void SetWindow(Windows::UI::Core::CoreWindow^ window);
    virtual void Load(Platform::String^ entryPoint);
    virtual void Run();
    virtual void Uninitialize();
	ViewProvider();
	
private:
    ActivationEntryPoint m_activationEntryPoint;
    Windows::UI::Core::CoreWindow^ m_window;
    Windows::ApplicationModel::Core::CoreApplicationView^ m_applicationView;
};

Platform::Agile does not exist and so I don't know what I am supposed to do to fix this warning. Has anyone seen/fixed this?

Thanks!

Answer 1

Hi TheMCP,

This is a known problem. I believe you can safely ignore the warning.

--Rob

Answer 2

Cool, thanks very much for (your usual) quick response!