Global hook with WM_MOUSEWHEEL?

Hi,

I want to use WH_GETMESSAGE or any other type of global hook to get the WM_MOUSEWHEEL message from other program.
However, none of them seems to work.

Currently, I am using WH_GETMESSAGE as my hook type, and in hook procedure, i have

if (pMsg->message == WM_MOUSEWHEEL)
{
    // Do something here
}

this only works when i try to use wheel in my program; the program does not seem to get the wheel message from any other program.
I do not know if this is because the code is wrong, or just because other application does not fire WM_MOUSEWHEEL message.
If i check WM_LBUTTONDOWN instead of WM_MOUSEWHEEL, the program works fine.
If i use SPY++ to monitor other programs (like notepad), it seems like it ignores WM_MOUSEWHEEL or something.

Is there any way to get the WM_MOUSEWHEEL message or force other program to fire the message?

Thanks
CoolTsubasaAsked:
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ChmodConnect With a Mentor Commented:
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Chmod
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jkrCommented:
Have you made it a system-wide hook by placing the HookProc in a DLL? See http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnwui/html/msdn_hooks32.asp ("Win32 Hooks")
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CoolTsubasaAuthor Commented:
Yes, it's system-wide hook.

And it works if i replace WM_MOUSEWHEEL message with WM_LBUTTONDOWN message.
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