Mixed mode exe (forms application)

[Robert Ginsburg]

I have created a .NET C++ forms application. I would like to call some
functions in an unmanged class that provides access to some underlying API
functions. The underlying class needs access to ATL (for example the CString
class). I created the app, added an unmanaged C++ class, changed the
compiler from /clrure to /clr. I added includes in stdafx.h . The system
compiles but fails during runtime (an assert fires on
_CrtIsValidHeapPointer ) apparently due to the fact that the ATL statics
are not initialized. According to
http://msdn2.microsoft.com/en-us/library/ms173267.aspx, I no longer need to
deal with _vcclrit.h or its idosynchrocises to make this work. However it
does not appear to work correctly.

Interestingly, if I create a Win32 project, and add a managed form to it,
all appears fine..

Any and all insight, pointers or help is appreciated

-Robert

 

[Jochen Kalmbach [MVP]]

Hi Robert!

I have created a .NET C++ forms application. I would like to call some
functions in an unmanged class that provides access to some underlying API
functions. The underlying class needs access to ATL (for example the CString
class). I created the app, added an unmanaged C++ class, changed the
compiler from /clrure to /clr. I added includes in stdafx.h . The system
compiles but fails during runtime (an assert fires on
_CrtIsValidHeapPointer ) apparently due to the fact that the ATL statics
are not initialized. According to
http://msdn2.microsoft.com/en-us/library/ms173267.aspx, I no longer need to
deal with _vcclrit.h or its idosynchrocises to make this work. However it
does not appear to work correctly.

Does the following help you?
http://msdn2.microsoft.com/ms235211

--
Greetings
Jochen

My blog about Win32 and .NET
http://blog.kalmbachnet.de/

 

[Robert Ginsburg]

No, that link focuses on adding CLR support to unmanaged applications. Which
I am successfully able to do. What I want to do is the reverse, I want to
add an unmanaged class, with access to ATL, to a .NET forms application.

 

[Jochen Kalmbach [MVP]]

Hi Robert!

No, that link focuses on adding CLR support to unmanaged applications. Which
I am successfully able to do. What I want to do is the reverse, I want to
add an unmanaged class, with access to ATL, to a .NET forms application.

It should be the same settings, regardless in which direction you "move"...

Do you have a small project which can be used to repor this problem?

Greetings
Jochen