HLID Enumerated Type

---

Identifies the logical positions of a hyperlink identifier in the hyperlink navigation stack. The constants are used in the IHlinkBrowseContext interface.

Syntax

enum 
{ 
    HLID_PREVIOUS     =  0xFFFFFFFF,
    HLID_NEXT         =  0xFFFFFFFE,
    HLID_CURRENT      =  0xFFFFFFFD,
    HLID_STACKBOTTOM  =  0xFFFFFFFC,
    HLID_STACKTOP     =  0xFFFFFFFB
};

Constants

HLID_PREVIOUS

Hyperlink prior to the current one. If the current hyperlink is the first or only hyperlink in the navigation stack, or if there are no hyperlinks in the navigation stack, there is no previous hyperlink, and methods such as IHlinkBrowseContext::GetHlink will return NULL and E_FAIL when passed this value.

HLID_NEXT

Hyperlink after the current one. If the current hyperlink is the last or only hyperlink in the navigation stack, or if there are no hyperlinks in the navigation stack, there is no next hyperlink, and methods such as IHlinkBrowseContext::GetHlink will return NULL and E_FAIL when passed this value.

HLID_CURRENT

Current hyperlink. A browsing tool might offer a command to reload the current page, or to recenter the user interface around the beginning portion of the current hyperlink destination, or to restart animation, sound, or other activity by renavigating to the current hyperlink.

HLID_STACKBOTTOM

First hyperlink in the navigation stack. If there are no hyperlinks in the navigation stack, there is no stack-bottom hyperlink, and methods such as IHlinkBrowseContext::GetHlink will return NULL and E_FAIL when passed this value.

HLID_STACKTOP

Last hyperlink in the navigation stack. If there are no hyperlinks in the navigation stack, there is no stack-top hyperlink, and methods such as IHlinkBrowseContext::GetHlink will return NULL and E_FAIL when passed this value.

Remarks

For convenience and performance, individual hyperlink objects are often identified in a navigation stack like a browse context or a history/favorites list using a ULONG hyperlink identifier or HLID rather than an IHlink interface pointer. This prevents unnecessary passing of interface pointers across process boundaries in common user-interface scenarios, such as building a drop-down menu or scrollable list of the history, or when testing the current location in the navigation stack to go back and forward.

Enumerated Type Information

Windows NT	Use version 4.0
Windows	Use Windows 95 and later
Header	Hlink.h
Minimum availability	Internet Explorer 3.0

Windows CE

Windows CE	Use version 2.12 and later
Minimum availability	Internet Explorer 4.0

See Also

HLQF, IHlinkBrowseContext::GetHlink, IHlinkBrowseContext::QueryHlink, IHlinkBrowseContext::SetCurrentHlink