Outlook application object

[Markus Donath]

I want to create an Outlook-appointment using .NET VC.
My Visual Basic example starts with:

Dim oApp As Microsoft.Office.Interop.Outlook.Application = New
Microsoft.Office.Interop.Outlook.Application

But my C++ translation:

Microsoft::Office::Interop::Outlook::Application *oApp = new
Microsoft::Office::Interop::Outlook::Application;
does not compile. ('You cannot create an instance of an interface' or
something like that). Does anybody know, what's wrong here?

Markus

[SvenC]

Hi Markus,

"Markus Donath" <ne******@microsoft.comwrote in message
news:OO**************@TK2MSFTNGP04.phx.gbl...

>I want to create an Outlook-appointment using .NET VC.
My Visual Basic example starts with:

Dim oApp As Microsoft.Office.Interop.Outlook.Application = New
Microsoft.Office.Interop.Outlook.Application

But my C++ translation:

Microsoft::Office::Interop::Outlook::Application *oApp = new
Microsoft::Office::Interop::Outlook::Application;
does not compile. ('You cannot create an instance of an interface' or
something like that). Does anybody know, what's wrong here?

Why not copy the exact error message?

Do you use VC2003 or VC2005?

In VC2003 I would expect that something like ApplicationClass or
_ApplicationClass would be available which represents the so called COM
coclass. A coclass is an object you can instantiate and use by an interface
it implements, which would be Application in thiscase.

In VC2005 you would want to use the new C++/CLI which uses ^ instead of *
for managed pointers and gcnew instead of new.

--
SvenC

Markus

[Carl Daniel [VC++ MVP]]

"Markus Donath" <ne******@microsoft.comwrote in message
news:OO**************@TK2MSFTNGP04.phx.gbl...

>I want to create an Outlook-appointment using .NET VC.
My Visual Basic example starts with:

Dim oApp As Microsoft.Office.Interop.Outlook.Application = New
Microsoft.Office.Interop.Outlook.Application

But my C++ translation:

Microsoft::Office::Interop::Outlook::Application *oApp = new
Microsoft::Office::Interop::Outlook::Application;
does not compile. ('You cannot create an instance of an interface' or
something like that). Does anybody know, what's wrong here?

You have to use CoCreateInstance to create an instance of a COM class. You
can't do it with new.

-cd

[Markus Donath]

SvenC wrote:

Hi Markus,

"Markus Donath" <ne******@microsoft.comwrote in message
news:OO**************@TK2MSFTNGP04.phx.gbl...

>I want to create an Outlook-appointment using .NET VC.
My Visual Basic example starts with:

Dim oApp As Microsoft.Office.Interop.Outlook.Application = New
Microsoft.Office.Interop.Outlook.Application

But my C++ translation:

Microsoft::Office::Interop::Outlook::Applicatio n *oApp = new
Microsoft::Office::Interop::Outlook::Applicatio n;
does not compile. ('You cannot create an instance of an interface' or
something like that). Does anybody know, what's wrong here?

Why not copy the exact error message?

Because it is produced by German version of Visual Studio .NET 2003 and
thus, the error message is in German:

error C3153: 'Microsoft::Office::Interop::Outlook::Application' : Sie
können keine Instanz einer Schnittstelle erstellen

>
Do you use VC2003 or VC2005?

VC2003

>
In VC2003 I would expect that something like ApplicationClass or
_ApplicationClass would be available which represents the so called COM
coclass. A coclass is an object you can instantiate and use by an interface
it implements, which would be Application in thiscase.

Have you got an example?

>
In VC2005 you would want to use the new C++/CLI which uses ^ instead of *
for managed pointers and gcnew instead of new.

--
SvenC

>Markus

[Markus Donath]

Carl Daniel [VC++ MVP] wrote:

"Markus Donath" <ne******@microsoft.comwrote in message
news:OO**************@TK2MSFTNGP04.phx.gbl...

>I want to create an Outlook-appointment using .NET VC.
My Visual Basic example starts with:

Dim oApp As Microsoft.Office.Interop.Outlook.Application = New
Microsoft.Office.Interop.Outlook.Application

But my C++ translation:

Microsoft::Office::Interop::Outlook::Applicatio n *oApp = new
Microsoft::Office::Interop::Outlook::Applicatio n;
does not compile. ('You cannot create an instance of an interface' or
something like that). Does anybody know, what's wrong here?

You have to use CoCreateInstance to create an instance of a COM class. You
can't do it with new.

-cd

I would be happy, if you could give an example for 'CoCreateInstance' in
this context.

Markus

[Willy Denoyette [MVP]]

"Markus Donath" <ne******@microsoft.comwrote in message
news:OO**************@TK2MSFTNGP04.phx.gbl...
|I want to create an Outlook-appointment using .NET VC.
| My Visual Basic example starts with:
|
| Dim oApp As Microsoft.Office.Interop.Outlook.Application = New
| Microsoft.Office.Interop.Outlook.Application
|
| But my C++ translation:
|
| Microsoft::Office::Interop::Outlook::Application *oApp = new
| Microsoft::Office::Interop::Outlook::Application;
|
|
| does not compile. ('You cannot create an instance of an interface' or
| something like that). Does anybody know, what's wrong here?
|
| Markus

Application refers to an interface which obviously cannot be instantiated,
you need to create an instance of ApplicationClass like :

Microsoft::Office::Interop::Outlook::ApplicationCl ass *oApp = new
Microsoft::Office::Interop::Outlook::ApplicationCl ass();
Willy.

[Willy Denoyette [MVP]]

"Carl Daniel [VC++ MVP]" <cp*****************************@mvps.org.nospam >
wrote in message news:%2***************@TK2MSFTNGP02.phx.gbl...
| "Markus Donath" <ne******@microsoft.comwrote in message
| news:OO**************@TK2MSFTNGP04.phx.gbl...
| >I want to create an Outlook-appointment using .NET VC.
| My Visual Basic example starts with:
| >
| Dim oApp As Microsoft.Office.Interop.Outlook.Application = New
| Microsoft.Office.Interop.Outlook.Application
| >
| But my C++ translation:
| >
| Microsoft::Office::Interop::Outlook::Application *oApp = new
| Microsoft::Office::Interop::Outlook::Application;
| >
| >
| does not compile. ('You cannot create an instance of an interface' or
| something like that). Does anybody know, what's wrong here?
|
| You have to use CoCreateInstance to create an instance of a COM class.
You
| can't do it with new.
|
| -cd
|

Hmmm... this is a managed client, and the interop assembly is a managed
wrapper, so there is no problem to new an instance of the ApplicationClass.

Willy.

|

[Markus Donath]

Willy Denoyette [MVP] wrote:

"Markus Donath" <ne******@microsoft.comwrote in message
news:OO**************@TK2MSFTNGP04.phx.gbl...
|I want to create an Outlook-appointment using .NET VC.
| My Visual Basic example starts with:
|
| Dim oApp As Microsoft.Office.Interop.Outlook.Application = New
| Microsoft.Office.Interop.Outlook.Application
|
| But my C++ translation:
|
| Microsoft::Office::Interop::Outlook::Application *oApp = new
| Microsoft::Office::Interop::Outlook::Application;
|
|
| does not compile. ('You cannot create an instance of an interface' or
| something like that). Does anybody know, what's wrong here?
|
| Markus

Application refers to an interface which obviously cannot be instantiated,
you need to create an instance of ApplicationClass like :

Microsoft::Office::Interop::Outlook::ApplicationCl ass *oApp = new
Microsoft::Office::Interop::Outlook::ApplicationCl ass();
Willy.

Okay, that's it. Thank you.
Markus