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LB_INITSTORAGE (Windows Embedded CE 6.0)

  • Article

1/6/2010

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

See Also

Reference

List Boxes Messages
LB_ADDSTRING
LB_INSERTSTRING