about the callback function

[sandodo]

I am doing some source code on windows hook. The functions
JournalPlaybackFunc(), CallNextHookEx() and etc, I know,
are to build the loop to, for example, play back what recorded.
But the CALLBACks before the functions upset me, I am not clear
about what the functions are called through underground.
Does anybody can provide some information or drop
some web addresses on CALLBACK as referral?
Many thanks!

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[sandodo]

Does anybody has any information on the topic of CALLBACK?
I posted this thread a few days ago but nobody answered yet.

[PaulWendt]

In the file windef.h, CALLBACK is #define'd as such:

#ifdef _MAC
#define CALLBACK    PASCAL
#elif (_MSC_VER >= 800) || defined(_STDCALL_SUPPORTED)
#define CALLBACK    __stdcall
#else
#define CALLBACK
#endif

On my system [with Visual Studio 6.0 SP5], CALLBACK winds up being __stdcall. __stdcall is just a way for Visual Studio to keep track of how arguments are to be pushed on the stack. There are others, too (eg: __fastcall, __cdecl, thiscall).

See the following links for details:

http://msdn.microsoft.com/library/de...___stdcall.asp

http://msdn.microsoft.com/library/de...re___cdecl.asp

--Paul

[sandodo]

Thanks a lot for your reply. Paul.