BDS2006 vs. C++Builder 5: EnumChildWindows

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2 total messages Started by Udo Weik Sun, 17 Dec 2006 23:23

#2875

Author: Udo Weik
Date: Sun, 17 Dec 2006 23:23

22 lines
1676 bytes

Hello,

EnumChildWindows is defined as follows:
   BOOL EnumChildWindows( HWND hWndParent, WNDENUMPROC lpEnumFunc, LPARAM lParam ) ;

With C++Builder 5, I used the following call:
   EnumChildWindows( HANDLE, EnumFunct, PARAM ) ;

That does't work with BDS2006, I have gotten the following error message:
   [C++ Error] ...: E2034 Cannot convert 'int (__stdcall *)(void *,long)' to 'int (__stdcall *)()'
   [C++ Error] ...: E2342 Type mismatch in parameter 'lpEnumFunc' (wanted 'int (__stdcall *)()',
                          got 'int (__stdcall *)(void *,long)')

After casting EnumFunct as WNDENUMPROC
   EnumChildWindows( HANDLE, (WNDENUMPROC)EnumFunct, PARAM ) ;
compiling was successful.

Any comments would be highly appreciated!


Thanks and greetings
Udo

Re: BDS2006 vs. C++Builder 5: EnumChildWindows

#2876

Author: Ed Mulroy
Date: Sun, 17 Dec 2006 23:37

39 lines
2261 bytes

Double check that you implentation of EnumFunc is declared as either of 
WINAPI or __stdcall

If that isn't it then try this:

Define STRICT either in your project or in your source file before any 
includes.  As in:

#define STRICT

STRICT is a Microsoft creation added when they added having their compiler 
actually look a the number types calling arguments to a function (such as 
Borland had done for a long while).  Use of it appears in their licensed 
Windows header files.

.  Ed

> Udo Weik wrote in message
> news:4585d0e9@newsgroups.borland.com...
>
> EnumChildWindows is defined as follows:
>   BOOL EnumChildWindows( HWND hWndParent, WNDENUMPROC lpEnumFunc, LPARAM 
> lParam ) ;
>
> With C++Builder 5, I used the following call:
>   EnumChildWindows( HANDLE, EnumFunct, PARAM ) ;
>
> That does't work with BDS2006, I have gotten the following error message:
>   [C++ Error] ...: E2034 Cannot convert 'int (__stdcall *)(void *,long)' 
> to 'int (__stdcall *)()'
>   [C++ Error] ...: E2342 Type mismatch in parameter 'lpEnumFunc' (wanted 
> 'int (__stdcall *)()',
>                          got 'int (__stdcall *)(void *,long)')
>
> After casting EnumFunct as WNDENUMPROC
>   EnumChildWindows( HANDLE, (WNDENUMPROC)EnumFunct, PARAM ) ;
> compiling was successful.
>
> Any comments would be highly appreciated!

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