cannot instantiate abstract class - Compiler error.

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K

KarthikonIT

Hi,

I have created a plugin for Outlook, I want add ribbon controls to my

existing OUtlook plugin.

When I Implement "IRibbonExtensibility" Interface in the class that was

implemented "_IDTExtensibility2" Interface it throws

up the following error message

ATL::CComObject<Base>' : cannot instantiate abstract class

with

[

Base=CGrabExplorer

due to following members:

'HRESULT Office::IRibbonExtensibility::raw_GetCustomUI(BSTR,BSTR *)' :

is abstract

I have implemented "GetCustomUI" API and returning S_OK

How do i resolve this?

Thanks in Advance.

 
GetCustomUI() returns a string value, specifically a BStr, not S_OK. Does

your declaration look something like this, given that my declaration is from

a C# project:

[ComImport(), Guid("000C0396-0000-0000-C000-000000000046"),

TypeLibType((short)0X1040)]

public interface IRibbonExtensibility

{

[return: MarshalAs(UnmanagedType.BStr)]

[MethodImpl(MethodImplOptions.InternalCall, MethodCodeType =

MethodCodeType.Runtime), DispId(1)]

string GetCustomUI([In(), MarshalAs(UnmanagedType.BStr)] string RibbonID);

}

"KarthikonIT " <u54961@uwe> wrote in message

news:9ffc994f04fcd@uwe...
> Hi,
> I have created a plugin for Outlook, I want add ribbon controls to my
> existing OUtlook plugin.
> When I Implement "IRibbonExtensibility" Interface in the class that was
> implemented "_IDTExtensibility2" Interface it throws
> up the following error message

> ATL::CComObject<Base>' : cannot instantiate abstract class
> with
> [
> Base=CGrabExplorer
> ]
> due to following members:
> 'HRESULT Office::IRibbonExtensibility::raw_GetCustomUI(BSTR,BSTR *)'
> :
> is abstract

> I have implemented "GetCustomUI" API and returning S_OK

> How do i resolve this?

> Thanks in Advance.

> >
>
 
Hi,

Thx for ur reply,

I ve created my plugin in C++,

STDMETHOD(GetCustomUI)(BSTR RibbonID, BSTR * RibbonXml)

This API will return XML content of the ribbon control in "RibbonXml"

parameter so the return value is not a string.

My sample works fine but when i implement this "IRibbonExtensibility"

interface in my existing Outlook plugin it throws

up the error

ATL::CComObject<Base>' : cannot instantiate abstract class

with

[

Base=CGrabExplorer

due to following members:

'HRESULT Office::IRibbonExtensibility::raw_GetCustomUI(BSTR,BSTR *)' :

is abstract"

I m implementing this interface in the class which already implmented

"_IDTExtensibility2"

I ve tried this multiple times but it throws up same error.

Thanks..
- wrote:
> GetCustomUI() returns a string value, specifically a BStr, not S_OK. Does
> your declaration look something like this, given that my declaration is from
> a C# project:

> [ComImport(), Guid("000C0396-0000-0000-C000-000000000046"),
> TypeLibType((short)0X1040)]

> public interface IRibbonExtensibility

> {

> [return: MarshalAs(UnmanagedType.BStr)]

> [MethodImpl(MethodImplOptions.InternalCall, MethodCodeType =
> MethodCodeType.Runtime), DispId(1)]

> string GetCustomUI([In(), MarshalAs(UnmanagedType.BStr)] string RibbonID);

> }
>
> > Hi,
> > I have created a plugin for Outlook, I want add ribbon controls to my

> [quoted text clipped - 18 lines]
>

>> Thanks in Advance.



200912
 
You definitely have to handle the ribbon callbacks in the same class that

implements extensibility.

See if the C++ information for the ribbon at

http://blogs.msdn.com/jensenh/archive/2006/12/08/using-ribbonx-with-c-and-atl.aspx

helps you at all. I don't do C++ addins, so I can't help more specifically.

"KarthikonIT " <u54961@uwe> wrote in message

news:a00a15eef9208@uwe...
> Hi,

> Thx for ur reply,
> I ve created my plugin in C++,

> STDMETHOD(GetCustomUI)(BSTR RibbonID, BSTR * RibbonXml)

> This API will return XML content of the ribbon control in "RibbonXml"
> parameter so the return value is not a string.

> My sample works fine but when i implement this "IRibbonExtensibility"
> interface in my existing Outlook plugin it throws

> up the error

> ATL::CComObject<Base>' : cannot instantiate abstract class
> with
> [
> Base=CGrabExplorer
> ]
> due to following members:
> 'HRESULT Office::IRibbonExtensibility::raw_GetCustomUI(BSTR,BSTR
> *)' :
> is abstract"

> I m implementing this interface in the class which already implmented
> "_IDTExtensibility2"

> I ve tried this multiple times but it throws up same error.

> Thanks..
>
 
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