Re: inheriting the VC++ template classes into

"Alexander Nickolov" <>
Wed, 17 Jan 2007 09:16:54 -0800
I didn't see any template<> in your code...

At any rate, this is a C++ class and cannot be accessed
directly in .NET. You need to wrap it in a C++/CLI
class first, or expose it via COM and COM Interop
(what Brian suggested). For the first approach (e.g. if
it's possible with MFC) you should ask in the C++/CLI

For the second approach you can ask in the Interop group:


Alexander Nickolov
Microsoft MVP [VC], MCSD

"Amu" <> wrote in message

Alexander Nickolov wrote:

.NET 2.0 introduced generics. Depending on your template
use, you may or may not be able to translate the code to
C++/CLI using generics. Generics are useable from C#.

Note this question should be addresed towards the C++/CLI

Ah, of course as others already mentioned, C++ templates
are not visible in .NET since the framework does not
support such feature. Generics are the semantically closest
feature supported in .NET.

Alexander Nickolov
Microsoft MVP [VC], MCSD

"Amu" <> wrote in message

Kim Gr?sman wrote:

Hi Amu,

Hi i am stuck up in a part of project where i have to inherit the VC++
template classes into Please provide me the solution for this

Templates are a language feature of C++, it doesn't exist in C#.

Could you show what you are trying to do in a little more detail, and
we can come up with an alternate solution?

Best Regards,
Kim Gr?sman

can u give me some clear idea regarding
it.actually i have a dll ( template class) ready which is written in
VC++6. But presently i need to inherit its classes into my new C#./net if there is some better solution with u then please give me
the solution.

The C++ classes which I mentioned are classes which are derived from
MFC standard classes like CPropertyPage and CPropertySheet.

These template classes are simple MFC classes which are packaged as a
DLL. Since the Implementation part of this DLL is huge, I can't think
of rewriting the whole code in C#.

I have attached the the class template code snippet for your reference.
I need to inherit from this class, DTMPOPropertyPage in C#.

How can I achieve this?

class AFX_EXT_CLASS DTMPOPropertyPage : public CPropertyPage


// Construction



            DTMPOPropertyPage(FDTXmtrDoc *doc, UINT nIDTemplate = 0,
UINT nCaption = 0);



                        // NOTE - ClassWizard will add data members

                        // DO NOT EDIT what you see in these blocks
of generated code !


            // Attributes


            // Access to determine if performing CANCEL processing.

            // Pages use this to avoid validation

            //BOOL InCancelProcessing ();

// Overrides

            // ClassWizard generate virtual function overrides


            // Define a generic OnKillFocus handler for use by all

            //afx_msg void OnKillFocus();

            virtual void DoDataExchange(CDataExchange* pDX); //
DDX/DDV support


            virtual BOOL OnInitDialog() { return
CPropertyPage::OnInitDialog(); }

            virtual BOOL OnSetActive() { UpdateData(FALSE); return
CPropertyPage::OnSetActive(); }

            //virtual BOOL OnKillActive();

            // access to BO parameters

            virtual void SetValues() = 0;

            virtual void UpdateDocument() = 0;

            // access to AppInfo

            FDTAppInfo *GetAppInfo();

// Implementation


            // Generated message map functions


                        // NOTE: the ClassWizard will add member
functions here


    //afx_msg LRESULT OnCommandHelp(WPARAM, LPARAM lParam);

            //afx_msg LRESULT OnShiftF1Help(WPARAM, LPARAM lParam);

            //afx_msg void OnHelp( );

            afx_msg BOOL OnHelpInfo( HELPINFO* lpHelpInfo );


            DTMPOPropertySheet *GetSheet();

            // pointer to document

            FDTXmtrDoc *mDoc;


            void SetSheet( DTMPOPropertySheet *ps );

            friend class DTMPOPropertySheet;

            mDTMPOPropertyPage *m;


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