Note
Access to this page requires authorization. You can try signing in or changing directories.
Access to this page requires authorization. You can try changing directories.
Maps the index of an item to a unique ID.
Parameters
-
wParam
-
The index of an item.
-
lParam
-
Must be zero.
Return value
Returns a unique ID.
Remarks
List-view controls internally track items by index. This can present problems because indexes can change during the control's lifetime.
The list-view control can tag an item with an ID when the item is created. You can use this ID to guarantee uniqueness during the lifetime of the list-view control.
To uniquely identify an item, take the index that is returned from a call such as IComponent::GetDisplayInfo and call LVM_MAPINDEXTOID. The return value is a unique ID.
Note
In a multithreaded environment, the index is only guaranteed on the thread that hosts the list-view control, not on background threads.
Note
To use this message, you must provide a manifest specifying Comclt32.dll version 6.0. For more information on manifests, see Enabling Visual Styles.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client |
Windows Vista [desktop apps only] |
| Minimum supported server |
Windows Server 2003 [desktop apps only] |
| Header |
|