USER & GDI Compat, part 5 -- Miscellaneous

re: USER & GDI Compat, part 5 -- Miscellaneous

Anonymous — Tue, 18 Apr 2006 09:26:45 GMT

Hmm, AppInit_DLLs is in the LOCAL_MACHINE tree. How would a non-admin app be able to change it before?

re: USER & GDI Compat, part 5 -- Miscellaneous

ChrisR — Tue, 18 Apr 2006 19:48:21 GMT

I'm confused by the JPEG wallpaper item. Quite a few of the default wallpapers in XP are JPEGs, and I have a JEPG photo as my wallpaper.

I hope you keep posting all this useful information, this blog has been very interesting (I only found it a few weeks ago).

re: USER & GDI Compat, part 5 -- Miscellaneous

nkramer — Fri, 21 Apr 2006 01:53:37 GMT

Chris -- Sorry, that wasn't real clear, was it. On Windows XP, USER doesn't support jpeg wallpaper. Rather, when you set the wallpaper, if you specify a .jpg, the Windows Shell translates it into a .bmp which USER can understand. On Windows Vista, USER understands .jpg, and because .jpg can be considerably smaller than the equivalent .bmp, it can increase login time significantly.

Now, for architectural purity reasons, the implementation changes the timing of when the background is loaded, so we've seen bugs like the background not getting correctly rotated on a tablet (because the rotation happened before the .jpg was even loaded). We've fixed everything we know about, but want to make sure there aren't more.

re: USER & GDI Compat, part 5 -- Miscellaneous

ChrisR — Mon, 24 Apr 2006 09:07:48 GMT

Ahh ok, thanks Nick, that makes sense now. Pretty interesting stuff.

USER & GDI Compatibility in Windows Vista, wrapup

Nick on Windows Presentation Foundation (Avalon) — Mon, 24 Apr 2006 22:17:18 GMT

This content will make it into the master compatibility document in the next month or so, but in the...

re: USER & GDI Compat, part 5 -- Miscellaneous

David Hopwood — Mon, 08 May 2006 22:06:59 GMT

What's the motivation for the AppInit_DLLs feature, anyway? Since you're prepared to break compatibility with anything that was using it before by using a new registry key, it can't be that important.

Re: NetDDE -- I'm glad to see you're removing stuff for security reasons. There's still a *long* way to go in that direction.

AppInit_DLLs should be renamed Deadlock_Or_Crash_Randomly_DLLs

The Old New Thing — Thu, 13 Dec 2007 20:26:04 GMT

I don't know why it's there but it doesn't work.

USER & GDI Compat, part 5 -- Miscellaneous

re: USER & GDI Compat, part 5 -- Miscellaneous

re: USER & GDI Compat, part 5 -- Miscellaneous

re: USER & GDI Compat, part 5 -- Miscellaneous

re: USER & GDI Compat, part 5 -- Miscellaneous

USER &amp; GDI Compatibility in Windows Vista, wrapup

re: USER & GDI Compat, part 5 -- Miscellaneous

AppInit_DLLs should be renamed Deadlock_Or_Crash_Randomly_DLLs

USER & GDI Compatibility in Windows Vista, wrapup