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LVM_MAPINDEXTOID

Windows Mobile 6.5
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.


lResult = SendMessage( 
   (HWND) hWndControl, 
   (UINT) LVM_MAPINDEXTOID, 
   (WPARAM) wParam,    // = (WPARAM) (UINT) index;
   (LPARAM) lParam     // = 0; not used, must be zero
);

index

UINT that contains the index of an item.

lParam

Must be zero.

Returns a unique ID.

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.

Aa920793.note(en-us,MSDN.10).gifNote:
In a multithreaded environment, the index is only guaranteed on the thread that hosts the list-view control, not on background threads.

Headercommctrl.h
Windows Embedded CEWindows CE 5.0 and later
Windows MobileWindows Mobile Version 5.0 and later

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