No que diz respeito aos temas da Microsoft: A Microsoft finaliza silenciosamente o suporte a temas dinâmicos do Windows 7 .
While dynamic themes are no longer available from Microsoft, Windows 7 and 8 users can still get a new desktop background delivered to them every day by downloading and installing the company's Bing Desktop program. The application automatically updates the background with the same high resolution image that's put in place each day on the Bing.com homepage.
O Bing Desktop também está disponível no Windows Update.
Por outro lado: A Microsoft traz de volta fotos de temas dinâmicos novos temas do Windows 8 .
Mas se você deseja desenvolver seu próprio tema dinâmico alimentado por RSS, o artigo Papéis de parede dinâmicos de área de trabalho de feeds RSS diz:
if you want to make your own theme with pictures off the Internet, just copy the following text, paste it into Notepad, and change the 3 areas delimited with "<<<<<" and ">>>>>" (the Display Name is what shows up in the Theme control panel as the name for the theme). The RSS feed at the bottom must have the pictures as enclosure.
; Copyright © <<<<<Microsoft Corp.>>>>> [Theme] ; Windows 7 - IDS_THEME_DISPLAYNAME_AERO DisplayName=<<<<<Bing Dynamic>>>>> ; Computer - SHIDI_SERVER [CLSID\{20D04FE0-3AEA-1069-A2D8-08002B30309D}\DefaultIcon] DefaultValue=%SystemRoot%\System32\imageres.dll,-109 ; UsersFiles - SHIDI_USERFILES [CLSID\{59031A47-3F72-44A7-89C5-5595FE6B30EE}\DefaultIcon] DefaultValue=%SystemRoot%\System32\imageres.dll,-123 ; Network - SHIDI_MYNETWORK [CLSID\{F02C1A0D-BE21-4350-88B0-7367FC96EF3C}\DefaultIcon] DefaultValue=%SystemRoot%\System32\imageres.dll,-25 ; Recycle Bin - SHIDI_RECYCLERFULL SHIDI_RECYCLER [CLSID\{645FF040-5081-101B-9F08-00AA002F954E}\DefaultIcon] Full=%SystemRoot%\System32\imageres.dll,-54 Empty=%SystemRoot%\System32\imageres.dll,-55 [Control Panel\Cursors] AppStarting=%SystemRoot%\cursors\aero_working.ani Arrow=%SystemRoot%\cursors\aero_arrow.cur Hand=%SystemRoot%\cursors\aero_link.cur Help=%SystemRoot%\cursors\aero_helpsel.cur No=%SystemRoot%\cursors\aero_unavail.cur NWPen=%SystemRoot%\cursors\aero_pen.cur SizeAll=%SystemRoot%\cursors\aero_move.cur SizeNESW=%SystemRoot%\cursors\aero_nesw.cur SizeNS=%SystemRoot%\cursors\aero_ns.cur SizeNWSE=%SystemRoot%\cursors\aero_nwse.cur SizeWE=%SystemRoot%\cursors\aero_ew.cur UpArrow=%SystemRoot%\cursors\aero_up.cur Wait=%SystemRoot%\cursors\aero_busy.ani DefaultValue=Windows Aero [Sounds] ; IDS_SCHEME_DEFAULT SchemeName=Windows Default [Control Panel\Desktop] TileWallpaper=0 WallpaperStyle=10 Pattern= [VisualStyles] Path=%SystemRoot%\resources\themes\Aero\Aero.msstyles ColorStyle=NormalColor Size=NormalSize ColorizationColor=0X45409EFE Transparency=1 VisualStyleVersion=10 Composition=1 [MasterThemeSelector] MTSM=DABJDKT [Slideshow] Interval=20000 Shuffle=1 RSSFeed=<<<<<http://themeserver.microsoft.com/default.aspx?p=Bing&c=Desktop&m=en-US>>>>> [boot] SCRNSAVE.EXE=Save the file with an extension of .theme. Double-click it, confirm that you want to download attachments, and it will install itself and start downloading pictures as your desktop background.
Once the pictures are downloaded, you can go in and choose how often they cycle, change how they are displayed (cropped, filled, stretched, etc)
Para uma abordagem semelhante que pode ter mais algumas informações, consulte:
Este artigo usa o arquivo aero.theme como o arquivo base para editar.
Para informações sobre compartimentos, consulte:
Por que as imagens não estão funcionando na minha campanha de RSS?
Wikipedia - recinto do RSS
Aqui está um exemplo de um feed RSS fictício contendo recintos:
<rss version="2.0">
<channel>
<title>title here</title>
<description>description here</title>
<link>http://somwhere/somefeeds</link>
<item>
<title>title item 1</title>
<description>description item 1</description>
<enclosure url="http://somwhere/file1.jpg" length="23456" type="image/jpeg"/>
</item>
<item>
<title>title item 2</title>
<description>description item 2</description>
<enclosure url="http://somwhere/file2.jpg" length="12345" type="image/jpeg"/>
</item>
</channel>
</rss>