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timor.super@gmail.com - 13 Apr 2007 14:08 GMT

Hi all,

I'm trying to use a .net api from unmanaged MFC code.

I'm trying to use ClrCreateManagedInstance api, but as shown above,
my
var pDisp equals null before the ClrCreateManagedInstance call.

Can you correct my code ? (Or any other way to do that ?)

#include "mscoree.h"
#pragma comment (lib, "mscoree.lib")

CComPtr<IDispatch> pDisp;
HRESULT hr = S_OK;
hr = ClrCreateManagedInstance(L"System.Windows.Forms.MessageBox,
System.Windows.Forms, Version=2.0.50727.42, Culture=neutral,
PublicKeyToken=b77a5c561934e089",IID_IDispatch, (void**)&pDisp);

Thansk in advance for your help,

Best,

S.

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timor.super@gmail.com - 13 Apr 2007 16:26 GMT

On 13 avr, 15:08, timor.su...@gmail.com wrote:

> Hi all,
>
[quoted text clipped - 20 lines]
>
> S.

Let me add some information, if i try with System.Random that is part
of mscorlib
this :
hr =
ClrCreateManagedInstance(L"System.Random,mscorlib,PublicKeyToken=b03f5f7f11d50a3a",
IID_IManagedObject, (void**)&pWrap);

is working :)

but if i try with my own assembly :
hr = ClrCreateManagedInstance(L"MyAssembly.Class1,MyAssembly",
IID_IDispatch, (void**)&pDisp);

i have the hresult : E_NOINTERFACE value

Nb : my assembly isn't strong signed

Thanks for your answer

Reply to this Message

Ben Voigt - 13 Apr 2007 20:38 GMT

> On 13 avr, 15:08, timor.su...@gmail.com wrote:
>> Hi all,
[quoted text clipped - 34 lines]
> hr = ClrCreateManagedInstance(L"MyAssembly.Class1,MyAssembly",
> IID_IDispatch, (void**)&pDisp);

What compiler version is your assembly built with? Did you call
CorBindToRuntimeEx? If not, the documentation indicates that the .NET 1.0
runtime gets loaded and you won't be able to load newer assemblies.

> i have the hresult : E_NOINTERFACE value
>
> Nb : my assembly isn't strong signed
>
> Thanks for your answer

Reply to this Message

Ben Voigt - 13 Apr 2007 20:41 GMT

> On 13 avr, 15:08, timor.su...@gmail.com wrote:
>> Hi all,
[quoted text clipped - 34 lines]
> hr = ClrCreateManagedInstance(L"MyAssembly.Class1,MyAssembly",
> IID_IDispatch, (void**)&pDisp);

Maybe ClrCreateManagedInstance doesn't load the assembly for you. Try
loading System.Reflection.Assembly from mscorlib, and call Assembly.Load.
See http://msdn2.microsoft.com/en-us/library/y6k08yft(VS.80).aspx

> i have the hresult : E_NOINTERFACE value

Have you set the COMVisibleAttribute on your class?

> Nb : my assembly isn't strong signed
>
> Thanks for your answer

Reply to this Message

Marcus Heege - 16 Apr 2007 14:47 GMT

> Hi all,
>
[quoted text clipped - 20 lines]
>
> S.

You can't instantiate S.W.F.MessageBox, because it has a private constructor

:-)

Marcus

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