How to use Windows::Forms::UserControl on a CWnd based

Introduction

I tried to use a .NET based UserControl within an existing MFC application. First, things
seemed to be easy. But when I tried to add a member to my MFC dialog, I had to recognize,
that things were getting complicated. First I started to write a useful class allowing me
to add a member of any .NET UserControl to MFC applications.

template <class T> class CdotNETCtl
{
public:
    CdotNETCtl(void)
    {
    };

    ~CdotNETCtl(void)
    {
    };
            
    bool Create(CWnd *pWndParent)
    {
        bool bRetal = false;

        try
        {
            m_pCtl = T::Create();
            CWnd* pCtl = new CWnd();
            m_pCtl->Show();
            pCtl->Attach((HWND)m_pCtl->GetHandle());
            pCtl->SetOwner(pWndParent);
            pCtl->SetParent(pWndParent);
            pCtl->Detach();
            delete pCtl;
            bRetal = true;
        }
        catch(...)
        {
        }
        return bRetal;
    };

    bool Create(CWnd *pWndParent, int X, int Y, int newWidth, int newHeight)
    {
        bool bRetal = false;

        try
        {
            m_pCtl = T::Create();
            CWnd* pCtl = new CWnd();
            m_pCtl->Show();
            pCtl->Attach((HWND)m_pCtl->GetHandle());
            pCtl->SetOwner(pWndParent);
            pCtl->SetParent(pWndParent);
            pCtl->Detach();
            delete pCtl;
            m_pCtl->Left = X;
            m_pCtl->Top = Y;
            m_pCtl->Width = newWidth;
            m_pCtl->Height = newHeight;
            bRetal = true;
        }
        catch(...)
        {
        }
        return bRetal;
    };

    T* operator->()
    {
        if(!m_pCtl)
        {
            throw;
        }
        return m_pCtl;
    }
private:
    gcroot<T*> m_pCtl;
};

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