Geoff Chappell - Software Analyst
All the MSHTML Options listed on this page are ordinarily in the following registry key or in some subkey of it:
This ordinary location can be supplanted in various ways. First, a document host may specify so-called option and override keys. Second, though only in recent Windows versions, some options are also supported in policy keys. For interpretation, including the precedence of alternative registry locations, refer to the general discussion.
| Key | HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main |
| Value | AlwaysAllowExecCommand |
| Type | boolean |
| Default | false |
| Availability | MSHTML.DLL version 6.0 from Windows XP SP2, and higher |
The motivation for the AlwaysAllowExecCommand option may be the following difficulty that Microsoft hints at in the HTML and DHTML Reference: “Do not invoke the execCommand method until after the page loads.” The damage that might be risked from ignoring this injunction is unknown. It is known however that the document object’s implementation of this method ordinarily fails, in the sense of causing a runtime script error, if the document does not yet have a window or a sufficiently initialised windowed markup context. The AlwaysAllowExecCommand option defeats these defences.
The AlwaysAllowExecCommand option has no known user-interface support.
| Key | HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Settings |
| Value | Always Use My Colors |
| Type | boolean |
| Default | false |
| Availability | MSHTML.DLL version 4.71 and higher |
The Always Use My Colors option has user-interface support through Internet Properties in the Control Panel, as “Ignore colors specified on webpages” in the Accessiblity dialog (reached from the General tab).
| Key | HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Settings |
| Value | Always Use My Font Face |
| Type | boolean |
| Default | false |
| Availability | MSHTML.DLL version 4.71 and higher |
The Always Use My Font Face option has user-interface support through Internet Properties in the Control Panel, as “Ignore font styles specified on webpages” in the Accessiblity dialog (reached from the General tab).
| Key | HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Settings |
| Value | Always Use My Font Size |
| Type | boolean |
| Default | false |
| Availability | MSHTML.DLL version 4.71 and higher |
The Always Use My Font Size option has user-interface support through Internet Properties in the Control Panel, as “Ignore font sizes specified on webpages” in the Accessiblity dialog (reached from the General tab).
| Key | HKEY_CURRENT_USER\Software\Policies\Microsoft\Internet
Explorer\Settings HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Settings |
| Value | Anchor Color |
| Type | RGB string |
| Default | system colour COLOR_HOTLIGHT if platform
is NT and major version ≥ 6; else 0,0,255 |
| Availability | option: MSHTML.DLL version 4.71 and higher policy: MSHTML.DLL version 7.0 and higher |
The default as listed is from inspection of Windows Vista. Windows XP SP1a does not make cases, so that 0,0,255 is the only default.
The Anchor Color option has user-interface support through Internet Properties in the Control Panel, as “Unvisited” in the Colors dialog (reached from the General tab). It has user-interface support as a policy, too, through the Group Policy Object Editor, as “Prevent users from configuring the color of links that have not yet been clicked” in the Link Colors category (itself under “Display settings” and Internet Settings) of the Internet Explorer administrative template (displayed under Windows Components).
This option even has formal documentation: the page Determining the Preferred Hypertext Link Color explicitly directs the setting of this registry value in a document host’s override key.
| Key | HKEY_CURRENT_USER\Software\Policies\Microsoft\Internet
Explorer\Settings HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Settings |
| Value | Anchor Color Hover |
| Type | RGB string |
| Default | 255,0,0 |
| Availability | option: MSHTML.DLL version 4.71 and higher policy: MSHTML.DLL version 7.0 and higher |
The default as listed is from inspection of Windows Vista. The default for Windows XP SP1a is 0,0,128.
The Anchor Color Hover option has user-interface support through Internet Properties in the Control Panel, as “Hover” in the Colors dialog (reached from the General tab). It has user-interface support as a policy, too, through the Group Policy Object Editor, as “Prevent users from configuring the hover color” in the Link Colors category (itself under “Display settings” and Internet Settings) of the Internet Explorer administrative template (displayed under Windows Components).
This option even has formal documentation: the page Determining the Preferred Hypertext Link Color explicitly directs the setting of this registry value in a document host’s override key.
| Key | HKEY_CURRENT_USER\Software\Policies\Microsoft\Internet
Explorer\Settings HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Settings |
| Value | Anchor Color Visited |
| Type | RGB string |
| Default | computation from system colours COLOR_WINDOW
and COLOR_TEXT if platform is NT and major version
≥ 6; else 129,0,129 |
| Availability | option: MSHTML.DLL version 4.71 and higher policy: MSHTML.DLL version 7.0 and higher |
The default as listed is from inspection of Windows Vista. The computation is to average the red and blue components of COLOR_WINDOW and COLOR_TEXT but take green entirely from COLOR_TEXT. On a typical configuration with black text on white windows, the result is 128,0,128, which is also the default for Windows XP SP1a.
The Anchor Color Visited option has user-interface support through Internet Properties in the Control Panel, as “Visited” in the Colors dialog (reached from the General tab). It has user-interface support as a policy, too, through the Group Policy Object Editor, as “Prevent users from configuring the color of links that have already been clicked” in the Link Colors category (itself under “Display settings” and Internet Settings) of the Internet Explorer administrative template (displayed under Windows Components).
This option even has formal documentation: the page Determining the Preferred Hypertext Link Color explicitly directs the setting of this registry value in a document host’s override key.
| Key | HKEY_CURRENT_USER\Software\Policies\Microsoft\Internet
Explorer\Main HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main |
| Value | Anchor Underline |
| Type | string; case-insensitive no, yes or hover; anything else treated as yes |
| Default | yes |
| Availability | option: MSHTML.DLL version 4.71 and higher policy: MSHTML.DLL version 7.0 and higher |
The Anchor Underline option has user-interface support through Internet Properties in the Control Panel, as “Underline links” in the Browsing group on the Advanced tab. It has user-interface support as a policy, too, through the Group Policy Object Editor, as “Turn off configuring underline links” in the Browsing category (itself under “Advanced settings” and Internet Settings) of the Internet Explorer administrative template (displayed under Windows Components). In both user interfaces, the alternatives Always, Hover and Never translate as yes, hover and no.
| Key | HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\International |
| Value | AutoDetect |
| Type | boolean |
| Default | false |
| Availability | MSHTML.DLL version 5.0 and higher |
The AutoDetect option has no known user-interface support.
| Key | HKEY_CURRENT_USER\Software\Policies\Microsoft\Internet
Explorer\Settings HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Settings |
| Value | Background Color |
| Type | RGB string |
| Default | system colour COLOR_WINDOW |
| Availability | option: MSHTML.DLL version 4.71 and higher policy: MSHTML.DLL version 7.0 and higher |
MSHTML ignores this option if Use_DlgBox_Colors is true, which it is by default.
The Background Color option has user-interface support through Internet Properties in the Control Panel, as “Background” in the Colors dialog (reached from the General tab). It has user-interface support as a policy, too, through the Group Policy Object Editor, as “Prevent users from configuring background color” in the General Colors category (itself under “Display settings” and Internet Settings) of the Internet Explorer administrative template (displayed under Windows Components).
| Key | HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main |
| Value | Cleanup HTCs |
| Type | boolean |
| Default | false |
| Availability | MSHTML.DLL version 6.0 from Windows XP SP1a, and higher |
The Cleanup HTCs option has no known user-interface support.
| Key | HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main |
| Value | CSS_Compat |
| Type | string; case-insensitive never or always; anything else treated as neither |
| Default | neither |
| Availability | MSHTML.DLL version 6.0 and higher |
No string is defined explicitly for the default. A possibly reasonable interpretation, consistent with other registry settings, might be “auto”.
The CSS_Compat option has no known user-interface support.
| Key | HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\International |
| Value | Default_CodePage |
| Type | REG_BINARY, for dword |
| Default | TO BE DONE |
| Availability | MSHTML.DLL version 4.71 and higher |
This option is left at its default by MSHTML’s handling of a settings-change notification.
The Default_CodePage option has user-interface support from INETCPL but only through an old-style Fonts dialog that can be invoked programmatically by calling the exported function OpenFontsDialog.
| Key | HKEY_CURRENT_USER\Software\Policies\Microsoft\Internet
Explorer\International\Scripts HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\International\Scripts |
| Value | Default_IEFontSize |
| Type | REG_BINARY for byte,
REG_DWORD for word; coerced to 0 to 4 inclusive |
| Default | TO BE DONE |
| Availability | option: MSHTML.DLL version 5.0 and higher policy: MSHTML.DLL version 7.0 and higher |
The Default_IEFontSize option has no known user-interface support.
| Key | HKEY_CURRENT_USER\Software\Policies\Microsoft\Internet
Explorer\International\Scripts HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\International\Scripts |
| Value | Default_IEFontSizePrivate |
| Type | REG_BINARY for byte,
REG_DWORD for word; coerced to 0 to 4 inclusive |
| Default | TO BE DONE |
| Availability | MSHTML.DLL version 7.0 and higher |
The Default_IEFontSizePrivate option has no known user-interface support.
| Key | HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main |
| Value | Disable_Local_Machine_Navigate |
| Type | boolean |
| Default | true |
| Availability | MSHTML.DLL version 6.0 from Windows XP SP1a, and higher |
The Disable_Local_Machine_Navigate option has no known user-interface support.
| Key | HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Internet
Explorer\Main HKEY_CURRENT_USER\Software\Policies\Microsoft\Internet Explorer\Main HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main |
| Value | Disable Script Debugger |
| Type | boolean |
| Default | true |
| Availability | option: MSHTML.DLL version 4.71 and higher policy: MSHTML.DLL version 7.0 and higher |
This option is left at its default by MSHTML’s handling of a settings-change notification.
The Disable Script Debugger option has user-interface support through Internet Properties in the Control Panel, as “Disable script debugging (Other)” in the Browsing group on the Advanced tab. It has user-interface support as a policy, too, through the Group Policy Object Editor, as “Turn on script debugging” in the Browsing category (itself under “Advanced settings” and Internet Settings) of the Internet Explorer administrative template (displayed under Windows Components).
| Key | HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main |
| Value | DisableScriptDebuggerIE |
| Type | boolean |
| Default | true |
| Availability | MSHTML.DLL version 6.0 from Windows XP SP2, and higher |
This option is left at its default by MSHTML’s handling of a settings-change notification.
The DisableScriptDebuggerIE option has user-interface support through Internet Properties in the Control Panel, as “Disable script debugging (Internet Explorer)” in the Browsing group on the Advanced tab.
| Key | HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Internet
Explorer\Main HKEY_CURRENT_USER\Software\Policies\Microsoft\Internet Explorer\Main HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main |
| Value | Display Inline Images |
| Type | boolean |
| Default | true |
| Availability | option: MSHTML.DLL version 4.71 and higher policy: MSHTML.DLL version 7.0 and higher |
The Display Inline Images option has user-interface support through Internet Properties in the Control Panel, as “Show pictures” in the Multimedia group on the Advanced tab. It has user-interface support as a policy, too, through the Group Policy Object Editor, as “Turn off picture display” in the Multimedia category (itself under “Advanced settings” and Internet Settings) of the Internet Explorer administrative template (displayed under Windows Components).
| Key | HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Internet
Explorer\Main HKEY_CURRENT_USER\Software\Policies\Microsoft\Internet Explorer\Main HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main |
| Value | Display Inline Videos |
| Type | boolean |
| Default | true |
| Availability | MSHTML.DLL version 4.71 and higher policy: MSHTML.DLL version 6.0 from Windows Server 2003 SP1, and higher |
As a policy, the Display Inline Images option has user-interface support in the Group Policy Object Editor, as “Play videos in web pages” in the Advanced Page category (itself under Internet Control Panel) of the Internet Explorer administrative template (displayed under Windows Components).
| Key | HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Internet
Explorer\Main HKEY_CURRENT_USER\Software\Policies\Microsoft\Internet Explorer\Main HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main |
| Value | Enable AutoImageResize |
| Type | boolean |
| Default | true |
| Availability | option: MSHTML.DLL version 6.0 and higher policy: MSHTML.DLL version 7.0 and higher |
The Enable AutoImageResize option has user-interface support through Internet Properties in the Control Panel, as “Enable automatic image resizing” in the Multimedia group on the Advanced tab. It has user-interface support as a policy, too, through the Group Policy Object Editor, as “Turn off automatic image resizing” in the Multimedia category (itself under “Advanced settings” and Internet Settings) of the Internet Explorer administrative template (displayed under Windows Components).
| Key | HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main |
| Value | Expand Alt Text |
| Type | boolean |
| Default | false |
| Availability | MSHTML.DLL version 4.71 and higher |
The Expand Alt Text option has user-interface support through Internet Properties in the Control Panel, as “Always expand alt text for images” in the Accessibility group on the Advanced tab.
| Key | HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main |
| Value | Force Offscreen Composition |
| Type | boolean |
| Default | false |
| Availability | MSHTML.DLL version 5.50 from Internet Explorer 5.5 SP2, and higher |
The Force Offscreen Composition option has user-interface support through Internet Properties in the Control Panel, as “Force offscreen compositing even under Terminal Server” in the Browsing group on the Advanced tab.
| Key | HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Styles |
| Value | MaxScriptStatements |
| Type | dword |
| Default | 5 million |
| Availability | MSHTML.DLL version 4.71 and higher |
The MaxScriptStatements option has no known user-interface support.
| Key | HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Settings |
| Value | MiscFlags |
| Type | dword |
| Default | zero |
| Availability | MSHTML.DLL version 4.71 and higher |
This option is left at its default by MSHTML’s handling of a settings-change notification.
The MiscFlags option has no known user-interface support.
| Key | HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main |
| Value | Move System Caret |
| Type | boolean |
| Default | false |
| Availability | MSHTML.DLL version 4.72 and higher |
The Move System Caret option has user-interface support through Internet Properties in the Control Panel, as “Move system caret with focus/selection changes” in the Accessibility group on the Advanced tab.
| Key | HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Internet
Explorer\Main HKEY_CURRENT_USER\Software\Policies\Microsoft\Internet Explorer\Main HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main |
| Value | Page_Transitions |
| Type | boolean |
| Default | true |
| Availability | option: MSHTML.DLL version 5.50 and higher policy: MSHTML.DLL version 7.0 and higher |
The Page_Transitions option has user-interface support through Internet Properties in the Control Panel, as “Enable page transitions” in the Browsing group on the Advanced tab. It has user-interface support as a policy, too, through the Group Policy Object Editor, as “Turn off page transitions” in the Browsing category (itself under “Advanced settings” and Internet Settings) of the Internet Explorer administrative template (displayed under Windows Components).
| Key | HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Internet
Explorer\Main HKEY_CURRENT_USER\Software\Policies\Microsoft\Internet Explorer\Main HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main |
| Value | Play_Animations |
| Type | boolean |
| Default | true |
| Availability | option: MSHTML.DLL version 4.71 and higher policy: MSHTML.DLL version 6.0 from Windows Server 2003 SP1, and higher |
The Play_Animations option has user-interface support through Internet Properties in the Control Panel, as “Play animations in webpages” in the Multimedia group on the Advanced tab. It has user-interface support as a policy, too, through the Group Policy Object Editor, with the same description, in the Advanced Page category (itself under Internet Control Panel) of the Internet Explorer administrative template (displayed under Windows Components).
| Key | HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Internet
Explorer\Main HKEY_CURRENT_USER\Software\Policies\Microsoft\Internet Explorer\Main HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main |
| Value | Play_Background_Sounds |
| Type | boolean |
| Default | true |
| Availability | option: MSHTML.DLL version 4.71 and higher policy: MSHTML.DLL version 6.0 from Windows Server 2003 SP1, and higher |
The Play_Background_Sounds option has user-interface support through Internet Properties in the Control Panel, as “Play sounds in webpages” in the Multimedia group on the Advanced tab. It has user-interface support as a policy, too, through the Group Policy Object Editor, with the same description, in the Advanced Page category (itself under Internet Control Panel) of the Internet Explorer administrative template (displayed under Windows Components).
| Key | HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Internet
Explorer\Main HKEY_CURRENT_USER\Software\Policies\Microsoft\Internet Explorer\Main HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main |
| Value | Print_Background |
| Type | boolean |
| Default | false |
| Availability | option: MSHTML.DLL version 4.71 and higher policy: MSHTML.DLL version 7.0 and higher |
The Print_Background option has user-interface support through Internet Properties in the Control Panel, as “Print background colors and images” in the Printing group on the Advanced tab. It has user-interface support as a policy, too, through the Group Policy Object Editor, as “Allow the printing of background colors and images” in the Printing category (itself under “Advanced settings” and Internet Settings) of the Internet Explorer administrative template (displayed under Windows Components).
| Key | HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main |
| Value | Q051873 |
| Type | boolean |
| Default | false |
| Availability | MSHTML.DLL version 6.0 (only) |
The Q051873 option has no known user-interface support.
| Key | HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main |
| Value | Q300829 |
| Type | boolean |
| Default | false |
| Availability | MSHTML.DLL version 6.0 from Windows XP SP1, and higher |
The Q300829 option has no known-user interface support but does have documentation. According to the Microsoft Knowledge Base article Cannot Edit Content in Frames or Iframes in DHTML, this option enables a fix which Microsoft documents as having been introduced for Internet Explorer 5.5 SP2 and Internet Explorer 6 SP1. However, inspection of an MSHTML version 5.50.4807.2300 from Internet Explorer 5.5 SP2 shows no sign of support.
| Key | HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main |
| Value | Q331869 |
| Type | boolean |
| Default | false |
| Availability | MSHTML.DLL version 6.0 from Windows XP SP2, and higher |
The Q331869 option has no known user-interface support but does have documentation. According to the Microsoft Knowledge Base article The OnBeforeUnload and OnUnload Events Are Not Triggered in Internet Explorer 6 SP1 If the Body Tag Is Empty, this option enables a fix which Microsoft documents as having been introduced in a patched version of MSHTML that was released slightly after Internet Explorer 6 SP1. Among releases of MSHTML that were distributed with Windows, this option appears first in Windows XP SP2.
| Key | HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer |
| Value | RtfConverterFlags |
| Type | dword |
| Default | 0x00000001 |
| Availability | MSHTML.DLL version 4.71 and higher |
The RtfConverterFlags option has no known user-interface support.
| Key | HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer |
| Value | Show_FullURL |
| Type | boolean |
| Default | false |
| Availability | MSHTML.DLL version 4.71 up to but not including 7.0 |
The Show_FullURL option has user-interface support through Internet Properties in the Control Panel, as “Show Friendly URLs” in the Browsing group on the Advanced tab.
| Key | HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Internet
Explorer\Main HKEY_CURRENT_USER\Software\Policies\Microsoft\Internet Explorer\Main HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main |
| Value | Show image placeholders |
| Type | boolean |
| Default | false |
| Availability | option: MSHTML.DLL version 5.0 and higher policy: MSHTML.DLL version 7.0 and higher |
The Show image placeholders option has user-interface support through Internet Properties in the Control Panel, as “Show image download placeholders” in the Multimedia group on the Advanced tab. It has user-interface support as a policy, too, through the Group Policy Object Editor, as “Allow the display of image download placeholders” in the Multimedia category (itself under “Advanced settings” and Internet Settings) of the Internet Explorer administrative template (displayed under Windows Components).
| Key | HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Internet
Explorer HKEY_CURRENT_USER\Software\Policies\Microsoft\Internet Explorer HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer |
| Value | SmartDithering |
| Type | boolean |
| Default | true |
| Availability | option: MSHTML.DLL version 4.71 and higher policy: MSHTML.DLL version 7.0 and higher |
The SmartDithering option has user-interface support through Internet Properties in the Control Panel, as “Smart image dithering” in the Multimedia group on the Advanced tab. It has user-interface support as a policy, too, through the Group Policy Object Editor, as “Turn off smart image dithering” in the Multimedia category (itself under “Advanced settings” and Internet Settings) of the Internet Explorer administrative template (displayed under Windows Components).
| Key | HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Internet
Explorer\Main HKEY_CURRENT_USER\Software\Policies\Microsoft\Internet Explorer\Main HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main |
| Value | Smoothscroll |
| Type | boolean |
| Default | true |
| Availability | option: MSHTML.DLL version 4.71 and higher policy: MSHTML.DLL version 7.0 and higher |
The Smoothscroll option has user-interface support through Internet Properties in the Control Panel, as “Use smooth scrolling” in the Browsing group on the Advanced tab. It has user-interface support as a policy, too, through the Group Policy Object Editor, as “Turn off smooth scrolling” in the Browsing category (itself under “Advanced settings” and Internet Settings) of the Internet Explorer administrative template (displayed under Windows Components).
| Key | HKEY_CURRENT_USER\Software\Policies\Microsoft\Internet
Explorer\Settings HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Settings |
| Value | Text Color |
| Type | RGB string |
| Default | system colour COLOR_TEXT |
| Availability | option: MSHTML.DLL version 4.71 and higher policy: MSHTML.DLL version 7.0 and higher |
MSHTML ignores this option if Use_DlgBox_Colors is true, which it is by default.
The Text Color option has user-interface support through Internet Properties in the Control Panel, as “Text” in the Colors dialog (reached from the General tab). It has user-interface support as a policy, too, through the Group Policy Object Editor, as “Prevent users from configuring the text color” in the General Colors category (itself under “Display settings” and Internet Settings) of the Internet Explorer administrative template (displayed under Windows Components).
| Key | HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Internet
Explorer\Settings HKEY_CURRENT_USER\Software\Policies\Microsoft\Internet Explorer\Settings HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Settings |
| Value | Use Anchor Hover Color |
| Type | boolean |
| Default | false |
| Availability | option: MSHTML.DLL version 4.71 and higher policy: MSHTML.DLL version 7.0 and higher |
The Use Anchor Hover Color option has user-interface support through Internet Properties in the Control Panel, as “Use hover color” in the Colors dialog (reached from the General tab). It has user-interface support as a policy, too, through the Group Policy Object Editor, as “Turn on the hover color option” in the Link Colors category (itself under “Display settings” and Internet Settings) of the Internet Explorer administrative template (displayed under Windows Components).
| Key | HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Internet
Explorer\Main HKEY_CURRENT_USER\Software\Policies\Microsoft\Internet Explorer\Main HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main |
| Value | UseClearType |
| Type | boolean |
| Default | false |
| Availability | MSHTML.DLL version 7.0 and higher |
The UseClearType option has user-interface support through Internet Properties in the Control Panel, as “Always use ClearType for HTML” in the Multimedia group on the Advanced tab. It has user-interface support as a policy, too, through the Group Policy Object Editor, as “Turn off ClearType” in the Advanced Page category (itself under Internet Control Panel) of the Internet Explorer administrative template (displayed under Windows Components).
| Key | HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Internet
Explorer\Main HKEY_CURRENT_USER\Software\Policies\Microsoft\Internet Explorer\Main HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main |
| Value | Use_DlgBox_Colors |
| Type | boolean |
| Default | true |
| Availability | option: MSHTML.DLL version 4.71 and higher policy: MSHTML.DLL version 7.0 and higher |
When Use_DlgBox_Colors is true, MSHTML ignores both the Background Color and Text Color options.
The Use_DlgBox_Colors option has user-interface support through Internet Properties in the Control Panel, as “Use Windows colors” in the Colors dialog (reached from the General tab). It has user-interface support as a policy, too, through the Group Policy Object Editor, as “Prevent the use of Windows colors” in the General Colors category (itself under “Display settings” and Internet Settings) of the Internet Explorer administrative template (displayed under Windows Components).
| Key | HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main |
| Value | UseHR |
| Type | boolean |
| Default | false |
| Availability | MSHTML.DLL version 6.0 and higher |
The UseHR option has no known user-interface support but does have documentation. A page titled Adjusting Scale for Higher DPI Screens explicitly directs the setting of this registry value. No mention is made of susceptibility to a document host’s option key or override key.
| Key | HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Styles |
| Value | Use My Stylesheet |
| Type | boolean |
| Default | false |
| Availability | MSHTML.DLL version 4.71 and higher |
The Use My Stylesheet option has user-interface support through Internet Properties in the Control Panel, as “Format documents using my style sheet” in the Accessibility dialog (reached from the General tab).
| Key | HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Styles |
| Value | User Stylesheet |
| Type | REG_SZ |
| Availability | MSHTML.DLL version 4.71 and higher |
This option is ignored unless Use My Stylesheet is true.
The User Stylesheet option has user-interface support through Internet Properties in the Control Panel, as the “Style sheet” edit box and related Browse button in the Accessibility dialog (reached from the General tab).
| Key | HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main |
| Value | Use Stylesheets |
| Type | boolean |
| Default | true |
| Availability | MSHTML.DLL version 4.71 and higher |
The Use Stylesheets option has no known user-interface support.
| Key | HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main |
| Value | UseThemes |
| Type | boolean |
| Default | true |
| Availability | MSHTML.DLL version 6.0 and higher |
If MSHTML runs in a process that does not contain a module named either EXPLORER.EXE or IEXPLORE.EXE, it overrides UseThemes from the registry, forcing false.
The UseThemes option has user-interface support through Internet Properties in the Control Panel, as “Enable visual styles on buttons and controls in web pages” in the Browsing group on the Advanced tab.
| Key | HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Internet
Explorer\Main HKEY_CURRENT_USER\Software\Policies\Microsoft\Internet Explorer\Main HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main |
| Value | XMLHTTP |
| Type | boolean |
| Default | true |
| Availability | MSHTML.DLL version 7.0 and higher |
The XMLHTTP option has user-interface support through Internet Properties in the Control Panel, as “Enable native XMLHTTP support” in the Security group on the Advanced tab. It has user-interface support as a policy, too, through the Group Policy Object Editor, as “Enable Native XMLHttp Support” in the Security Features category of the Internet Explorer administrative template (displayed under Windows Components).