cannot open afx.h

I have used OWL and am now tryng to learn the MFC. This problem has me very frustrated. Just trying a "hello world" program from Windows MFC book by Jeff Prosise targeted at Visual C++. I use Borland 5.02. I use the include <mfc\afxwin.h> and get a compiler message "cannot open afx.h". afx.h is opened from afxwin.h which is obviously opened. any ideas???
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

I think the problem is in  your include path for the compiler.  You shouldn't have to use:

#include <mfc/afxwin.h>

but rather you should be using:

#include <afxwin.h>

Since the line in afxwin.h that includes afx.h says:

#include <afx.h>

you get an error because the compiler can't find afx.h.

Go to your compiler setup and add the directory where the mfc include files live to the path.  I don't have BC++ 5 so I can't tell you exactly where.
dutchAuthor Commented:
Sorry but the paths to the library is correct. Borland supplies two class libraries, OWL and MFC. The libraries are in BC5\Include\Owl(or Mfc).To get to the OWL includes the entry would be;
#include <owl\combobox.h>

So, the Afxwin.h gets opened OK using <Mfc\Afxwin.h>. There is no message saying that the compiler can not open it, only the Afx.h file is the problem. If I try it your way, #include <afxwin.h>, then the message is "...cannot open Axfwin.h" The first thing the Afxwin.h include does is #include <Afx.h>. That is the problem. I checked and the Project is pointing to the correct include and library directories...
Tommy HuiEngineerCommented:
Does the file exist? Where is the file? If the file does exist, make sure that you have that directory in your include path.

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Exploring SQL Server 2016: Fundamentals

Learn the fundamentals of Microsoft SQL Server, a relational database management system that stores and retrieves data when requested by other software applications.


You didn't read what I said.  Please read it again!
dutchAuthor Commented:
First, it is perfectly legal to point to a directory for an include file. Borland does this with both the OWL include files. The default directory for the project (I erroneously said "library" in my previous note) is f:\bc5\include. Beyond that, the OWL includes are in f:\bc5\include\owl and all the MFC (afx*.h) includes exist in f:\bc5\include\mfc. I have written several apps using OWL and the following syntax to access the OWL class include files (for example);

#include <owl\combobox.h>     //this always works

My assumption is that the same syntax should work for the mfc, for example;

#include <mfc\afxwin.h>         //fails opening include inside                                   afxwin.h

I went into the project and made the entry for the includes look as follows;

f:\bc5\include ; f:\bc5\include\mfc

The include line in my app is now;

#include <afxwin.h>

Now, the situation has improved. It compiles (and runs) but I get 11 warnings about virtual functions. The message from the help file is as follows;

'function1' hides virtual function 'function2'      
In this case, a declaration with the same name but different argument types makes the virtual functions inaccessible to further derived classes.

So, it looks like there is still something basically wrong???

You're right, it is perfectly legal to do:

#include <mfc/afxwin.h>

BUT IF "mfc/afxwin.h" has ANOTHER #include IN IT THAT DOES:

#include <afx.h>

(and it DOES!!)  Guess what?  It can't be found because Microsoft expects you to put mfc in the include path.

The virtual function warning is just that, a warning.  You haven't provided enough information about what is causing the problem.  If you were to post the function definition that is causing the problem, it would probably help.
dutchAuthor Commented:
Boy this sure makes sense now!! Thanks

The warning messages are all the same. It looks like the warnings are coming from Create(NULL, "The Hello Application") in the CMainWindow constructor. The messages look like this;

AFXWIN.H 'CDialog::Create(const char*, CWnd)' hides function 'CWnd::Create(const char*, unsigned long, const tagRect&, CWnd*, unsigned int, CCreateContext*)'

The remaining 10 warnings are exactly the same except the class identified is CButton, CStatic, CDialog, CButton, etc.
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
System Programming

From novice to tech pro — start learning today.