how to avoid an assert in AfxGetResourceHandle (in debugbuilds)

  • Thread starter Thread starter Guest
  • Start date Start date
G

Guest

Hi,
I have posted this on 8/19/2004 but was unclear in my intention. So here it
comes again:
how can I avoid the failing assert in the following scenario?

- create a managed C++ Windows Forms Application,
- in the designer view, drag a button on the form
- add the following code to the Click event for that button:
CFileDialog dlg(TRUE);
dlg.DoModal();
- #include <afxdlgs.h> in the Header of that from
- build and run the application (in debug mode)
- when you click the button the following assert in AfxGetResourceHandle
fails:
ASSERT(afxCurrentResourceHandle != NULL)

Note that in the project settings use MFC as shared library is turned on.

Thanks in advance


Arne
 
Ronald Laeremans said:
Did you add a CWinApp object?
Click to expand...

No, I assume that I should have done this.
I tried adding this line at (cpp) file-scope:
CWinApp hackForCFileDialog;
with no improvement.

Since I cannot have a CWinApp as a member variable in my managed Form where
should the CWinApp object live?

Thanks

Arne
 
It needs to be a global object.

Ronald

Arne said:
No, I assume that I should have done this.
I tried adding this line at (cpp) file-scope:
CWinApp hackForCFileDialog;
with no improvement.

Since I cannot have a CWinApp as a member variable in my managed Form
where
should the CWinApp object live?

Thanks

Arne
Click to expand...
 
Hi Ronald,
Ronald Laeremans said:
It needs to be a global object.
Click to expand...

sorry for the late reply, I'm trying to reduce weekend-working.

So then the filescope

CWinApp hackForCFileDialog;

in the cpp file of the form should have done it - but it did not work.

Thanks again

Arne
 
Can you try the other way around? Start an MFC project..Make it compile with
/clr and when you have that working see what else you might be missing in
your example?

Ronald
 
Hi Ronald,
Can you try the other way around? Start an MFC project..Make it compile with
/clr and when you have that working see what else you might be missing in
your example?
Click to expand...
I tried that, and as MFC project it works.
Then I tried to make the global CWinApp object an instance of a class
derived from CWinApp and override the InitInstance method as found in the MFC
Project.
This did not help. I noted that the InitInstance method was not called.
Explicitly calling that method from the default constructor of the CWinApp
derived class did not help either.
The mere existence of a CWinApp (derived) object is not sufficient to be
able to open a CFileDialog instance from a windows forms project.
Hence I assume that either the CWinApp object has to be bound somehow to the
windows forms application or it is simply not possible to open a CFileDialog
from a windows forms project.

Thanks again for the help

Arne
 
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