LB_INITSTORAGE
A version of this page is also available for
4/8/2010
This message allocates memory for storing list box items. An application sends this message before adding a large number of items to a list box.
Syntax
LB_INITSTORAGE wParam = (WPARAM)(int) cItems;
lParam = (LPARAM)(DWORD) cb;
Parameters
- cItems
Specifies the number of items to add.
- cb
Specifies the amount of memory, in bytes, to allocate for item strings.
Return Value
The total number of items for which memory has been preallocated — that is, the total number of items added by all successful LB_INITSTORAGE messages — indicates success. LB_ERRSPACE indicates failure.
Remarks
The lParam parameter is unused in Windows Embedded CE.
The LB_INITSTORAGE message helps speed up the initialization of list boxes that have a large number of items (more than 100). It reserves the specified amount of memory so that subsequent LB_ADDSTRING and LB_INSERTSTRING messages take the shortest possible time. You can use estimates for the cItems and cb parameters. If you overestimate, the extra memory is allocated; if you underestimate, the normal allocation is used for items that exceed the requested amount.
Requirements
| Header | winuser.h |
| Windows Embedded CE | Windows CE 1.0 and later |
| Windows Mobile | Windows Mobile Version 5.0 and later |