LVM_MAPINDEXTOID
A version of this page is also available for
4/8/2010
This message maps the index of an item to a unique identifier (ID).
To send this message, call the SendMessage function.
Syntax
lResult = SendMessage(
(HWND) hWndControl,
(UINT) LVM_MAPINDEXTOID,
(WPARAM) wParam, // = (WPARAM) (UINT) index;
(LPARAM) lParam // = 0; not used, must be zero
);
Parameters
- index
UINT that contains 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.
Note
In a multithreaded environment, the index is only guaranteed on the thread that hosts the list-view control, not on background threads.
Requirements
| Header | commctrl.h |
| Windows Embedded CE | Windows CE 5.0 and later |
| Windows Mobile | Windows Mobile Version 5.0 and later |