Re: SysTray changes in Windows 7 Beta compared to Vista

Karl-Henrik Henriksson [qwilk] wrote:
> 
> ...another change in Windows 7 Beta is that the size of the AppBar data 
> blob sent to the shell (commonly referred to as e.g. "SHELLAPPBARDATA" 
> to differentiate it from the actual APPBARDATA struct) is now 64 bytes, 
> whereas it used to be 56 bytes in Windows XP and Vista, and 48 bytes in 
> Windows 2000. Has anyone figured out what those extra 8 bytes are for 
> and whether or not the position of e.g. dwMessage has changed? (...I 
> haven't had time to trace it myself yet...)


Hi,

I'll probably take a look at these things over the next few days/next 
week. I had already noticed the odd appbar size (we have nice TRACEs for 
that sort of thing), but all I can say at this point is that the 
embedded APPBARDATA struct seems unchanged, as the first 4 bytes of 
lpData are set to 0x28.

There's also some odd stuff going on with 
SHLoadInProc/SHEnableServiceObject and WM_USER+216 messages sent to 
Shell_TrayWnd. SHLoadInProc is no longer implemented on Vista and up, 
but SHEnableServiceObject is still around. It only appears to accept 
certain CLSIDs though (whitelisted in Explorer.exe?).

I have no clue currently where the WM_USER+216 messages come from, but I 
see them sent/posted to Shell_TrayWnd on a regular basis. Again, TRACEs 
are nice. :)

-ilmcuts


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