🚀 go-pugleaf

> EnumWindows(EnumProc,0);  // this call causes the error
>
> [C++ Error] App.cpp(91): E2034 Cannot convert 'int (__stdcall *)(void 
> *,long)' to 'int (__stdcall *)()'
> [C++ Error] App.cpp(91): E2342 Type mismatch in parameter 'lpEnumFunc' 
> (wanted 'int (__stdcall *)()', got 'int (__stdcall *)(void *,long)')
> ...
> !!What on Earth is going on ??

I think that is due to differences in the Windows header files.

Long ago when MS only supported pre-ANSI standard C compiles did not support 
type checking of calling arguments.  Functions were prototyped without 
calling arguments.  Later they added C++ which requires that ability but it 
broke builds of old, legacy code.  To handle that they added the macro 
STRICT to cause function prototypes to be more strictly interpreted.  Since 
Borland must license the MS header files this facility to support a problem 
from 16 bit Windows continues to this day.

Try putting this on the first line of the source code file:
#define STRICT

.  Ed

> David wrote in message
> news:44954617$1@newsgroups.borland.com...
>
> When I use the same module in one project I get the following errors when 
> I call EnumProc as though it is expecting a different type of function 
> pointer. But in other projects it is OK. If I cast the function pointer 
> too what it thinks it expects then things are OK but I shouldn't have to 
> do this !!What on Earth is going on ??
>
> Thanks in advance
> David
>
> BOOL CALLBACK EnumProc(HWND h, LPARAM lp)
> {
>  ........
> }
>
> EnumWindows(EnumProc,0);  // this call causes the error
>
> [C++ Error] App.cpp(91): E2034 Cannot convert 'int (__stdcall *)(void 
> *,long)' to 'int (__stdcall *)()'
> [C++ Error] App.cpp(91): E2342 Type mismatch in parameter 'lpEnumFunc' 
> (wanted 'int (__stdcall *)()', got 'int (__stdcall *)(void *,long)')

Thanks

I tried this but still no go.

If I cast the parameter I don't think there will be any problems although I 
don't like doing kludges like this :-(

regards
david


"Ed Mulroy" <dont_email_me@bitbuc.ket> wrote in message 
news:449552e8$1@newsgroups.borland.com...
>> EnumWindows(EnumProc,0);  // this call causes the error
>>
>> [C++ Error] App.cpp(91): E2034 Cannot convert 'int (__stdcall *)(void 
>> *,long)' to 'int (__stdcall *)()'
>> [C++ Error] App.cpp(91): E2342 Type mismatch in parameter 'lpEnumFunc' 
>> (wanted 'int (__stdcall *)()', got 'int (__stdcall *)(void *,long)')
>> ...
>> !!What on Earth is going on ??
>
> I think that is due to differences in the Windows header files.
>
> Long ago when MS only supported pre-ANSI standard C compiles did not 
> support type checking of calling arguments.  Functions were prototyped 
> without calling arguments.  Later they added C++ which requires that 
> ability but it broke builds of old, legacy code.  To handle that they 
> added the macro STRICT to cause function prototypes to be more strictly 
> interpreted.  Since Borland must license the MS header files this facility 
> to support a problem from 16 bit Windows continues to this day.
>
> Try putting this on the first line of the source code file:
> #define STRICT
>
> .  Ed
>
>> David wrote in message
>> news:44954617$1@newsgroups.borland.com...
>>
>> When I use the same module in one project I get the following errors when 
>> I call EnumProc as though it is expecting a different type of function 
>> pointer. But in other projects it is OK. If I cast the function pointer 
>> too what it thinks it expects then things are OK but I shouldn't have to 
>> do this !!What on Earth is going on ??
>>
>> Thanks in advance
>> David
>>
>> BOOL CALLBACK EnumProc(HWND h, LPARAM lp)
>> {
>>  ........
>> }
>>
>> EnumWindows(EnumProc,0);  // this call causes the error
>>
>> [C++ Error] App.cpp(91): E2034 Cannot convert 'int (__stdcall *)(void 
>> *,long)' to 'int (__stdcall *)()'
>> [C++ Error] App.cpp(91): E2342 Type mismatch in parameter 'lpEnumFunc' 
>> (wanted 'int (__stdcall *)()', got 'int (__stdcall *)(void *,long)')
>
> 

Then try changing the first line of the source from

#define STRICT

  to

#define STRICT
#include <windows.h>

.  Ed

> David wrote in message
> news:44956252$1@newsgroups.borland.com...
> Thanks
>
> I tried this but still no go.
>
> If I cast the parameter I don't think there will be any problems although 
> I don't like doing kludges like this :-(

David wrote:

>I tried this but still no go.

Look in WINUSER.H

#ifdef STRICT

typedef BOOL (CALLBACK* WNDENUMPROC)(HWND, LPARAM);

#else /* !STRICT */

typedef FARPROC WNDENUMPROC;

#endif


WINUSERAPI
BOOL
WINAPI
EnumWindows(
    IN WNDENUMPROC lpEnumFunc,
    IN LPARAM lParam);

>>> [C++ Error] App.cpp(91): E2034 Cannot convert 'int (__stdcall *)(void 
>>> *,long)' to 'int (__stdcall *)()'
>>> [C++ Error] App.cpp(91): E2342 Type mismatch in parameter 'lpEnumFunc' 
>>> (wanted 'int (__stdcall *)()', got 'int (__stdcall *)(void *,long)')

Definately a STRICT problem.

Bob Gonder wrote:

>David wrote:
>
>>I tried this but still no go.
>
>Look in WINUSER.H
>
>#ifdef STRICT

Another thought is WINDEF.H where it says....

#ifndef NO_STRICT
#ifndef STRICT
#define STRICT 1
#endif
#endif /* NO_STRICT */

So make sure there isn't a NO_STRICT somewhere.

> So make sure there isn't a NO_STRICT somewhere.

FYI: VCL apps seem to have NO_STRICT defined (although a search of the 
header files doesn't seem to find it).  That is why I suggested that he 
define STRICT himself and do it before the #include list.

.  Ed

> Bob Gonder wrote in message
> news:rrcb92dsi5pgljuqp8v69732s6v0t56apm@4ax.com...
>
>>Look in WINUSER.H
>>
>>#ifdef STRICT
>
> Another thought is WINDEF.H where it says....
>
> #ifndef NO_STRICT
> #ifndef STRICT
> #define STRICT 1
> #endif
> #endif /* NO_STRICT */
>
> So make sure there isn't a NO_STRICT somewhere.

"Ed Mulroy" <dont_email_me@bitbuc.ket> wrote in message
news:4495ef49$1@newsgroups.borland.com...

> FYI: VCL apps seem to have NO_STRICT defined (although a
> search of the header files doesn't seem to find it).  That is why I
> suggested that he define STRICT himself and do it before the
> #include list.

Or just suck in his pride and use the WNDENUMPROC typedef in a cast.  Then
it won't matter whether STRICT is defined or not, ie:

    EnumWindows((WNDENUMPROC)EnumProc, 0);


Gambit